SETI Live

One of the coldest planetary-mass objects ever directly imaged has been hiding something unusual in its atmosphere: salt clouds.

Known as the "Pink Planet," GJ 504 b is a mysterious world orbiting a Sun-like star about 57 light-years from Earth. At roughly 25 times Jupiter's mass, it lies near the uncertain boundary between giant planets and brown dwarfs. It is also so cold and faint that previous attempts to study its atmosphere from the ground were unsuccessful.

Now, JWST has captured the first direct spectrum of GJ 504 b. The observations revealed an atmosphere containing water vapor, methane, carbon dioxide, ammonia, hydrogen sulfide, and other molecules. When researchers modeled the spectrum, they found that clouds—particularly salt clouds—were essential to explaining what JWST observed.

Join host Dr. Moiya McTier and lead author Dr. Aneesh Baburaj (Northwestern University) to learn how astronomers separated the faint light of GJ 504 b from the glare of its host star, what salt clouds can tell us about cold planetary atmospheres, and why scientists still are not sure whether the Pink Planet formed like a planet or a star.

Read the paper: https://iopscience.iop.org/article/10.3847/1538-3881/ae6919

Read the Northwestern University story: https://news.northwestern.edu/stories/2026/06/famous-pink-planet-harbors-a-salty-surprise

NASA's next great observatory is here.

The Nancy Grace Roman Space Telescope is designed to revolutionize our understanding of the universe, from dark energy to thousands of newly discovered exoplanets. But one of its most exciting instruments is the Coronagraph—a cutting-edge technology that can block the overwhelming glare of distant stars, allowing astronomers to directly observe planets orbiting them.

Joining host Dr. Franck Marchis is Dr. Margaret Turnbull, senior scientist at the SETI Institute and Co-Principal Investigator on Roman's Coronagraph Instrument. She'll explain how this remarkable technology works, what we'll learn from the mission, and why Roman is paving the way toward future telescopes capable of imaging Earth-like worlds.

We'll discuss: • Why Roman is NASA's newest flagship space observatory • How a coronagraph "creates an artificial eclipse" • The challenge of directly imaging exoplanets • What Roman will reveal about giant planets and planetary systems • How Roman prepares us to search for potentially habitable worlds • What excites scientists most as launch approaches

Whether you're fascinated by exoplanets, space telescopes, or the search for life beyond Earth, this episode offers a behind-the-scenes look at one of NASA's most ambitious missions.

Fifty years ago, on July 20, 1976, Viking 1 became the first spacecraft to successfully land and operate on Mars, transforming our understanding of the Red Planet and launching a new era of planetary exploration. Today, sophisticated robotic explorers like Curiosity and Perseverance continue that legacy, searching for signs of ancient habitability and preparing the way for future human missions.

Join host Dr. Simon Steel and planetary scientist Dr. Pascal Lee as they explore the remarkable history of Mars rovers and landers—from Viking, Sojourner, Spirit, Opportunity, Curiosity, and Perseverance to the next generation of robotic explorers being developed for Mars, the Moon, and beyond. They'll discuss what we've learned from five decades of exploration, the technologies that made it possible, and where robotic exploration may take us next. Recent concepts even include adapting Mars rover technology for future lunar missions.

What have Mars rovers taught us about our neighboring world? What mysteries remain unsolved? And what might the next 50 years of planetary exploration look like?

Are we searching for extraterrestrial intelligence the wrong way?

For decades, SETI researchers have focused on finding narrowband radio signals that might stand out from the natural universe. But what if an advanced civilization that wanted to communicate chose a very different strategy?

Join host Dr. Lauren Sgro and UCLA astronomer Dr. Ben Zuckerman as they discuss his new paper, Broadband Searches for Extraterrestrial Technological Intelligence: A New Strategy to Find Nearby Alien Civilizations. The research proposes a new approach to SETI that focuses on broadband signals and existing astronomical surveys, potentially changing how we search for evidence of technological civilizations beyond Earth.

Could signs of extraterrestrial technology already be hidden in data we've collected for entirely different purposes? What can current observations tell us about the likelihood of nearby communicative civilizations? And what does the cosmos's apparent silence really mean?

Paper: https://iopscience.iop.org/article/10.3847/1538-4357/ae4c38

Could hazy exoplanet atmospheres be hiding important clues about alien worlds?

Many potentially habitable planets orbit small, active stars that frequently unleash powerful bursts of ultraviolet radiation. New research shows that this radiation can alter the chemistry and optical properties of atmospheric hazes, changing what astronomers see when they observe these distant worlds.

Join host Dr. Moiya McTier as she welcomes graduate researcher Lori Huseby (University of Arizona) and Dr. Sarah Moran (NASA Goddard Space Flight Center) to discuss how laboratory experiments are helping scientists understand how stellar radiation affects water-rich exoplanet atmospheres. Their findings could improve how we interpret James Webb Space Telescope observations and future missions searching for signs of habitability beyond our Solar System.

How do stellar flares reshape alien skies? What do atmospheric hazes tell us about a planet's environment? And could understanding these hazes help us identify worlds capable of supporting life?

Paper: https://iopscience.iop.org/article/10.3847/1538-4357/ae6cdb

The James Webb Space Telescope is transforming our understanding of exoplanets—but what happens when clouds get in the way? Astronomers have developed a new method to detect clouds and hazes in distant planetary atmospheres, helping researchers determine when they're seeing the planet itself and when weather obscures the view.

Join SETI Live as host Dr. Lauren Sgro welcomes lead author Dr. Sagnick Mukherjee to discuss this innovative method, how it works, and what it means for the future of exoplanet science and the search for life beyond Earth.

Press release: https://hub.jhu.edu/2026/05/21/astronomy-exoplanet-atmospheres-detecting-clouds/

Paper: http://www.science.org/doi/10.1126/science.adx5903

What happens after we discover evidence of extraterrestrial intelligence?

The International Academy of Astronautics has just ratified the first major update to the SETI post-detection protocols in more than 15 years. These new guidelines address the realities of today's world, including social media, AI-generated misinformation, deepfakes, international coordination, and the challenge of responsibly communicating extraordinary discoveries.

At the same time, the SETI Institute has launched the Discovery and Futures Lab, a new interdisciplinary initiative dedicated to exploring the scientific, social, ethical, legal, and cultural implications of discovering life beyond Earth.

Join host Dr. Lauren Sgro and guests Dr. Lucian Walkowicz and Dr. Chelsea Haramia as they discuss what these new protocols mean, why humanity needs to prepare for transformative discoveries before they happen, and how scientists, policymakers, communicators, and the public might respond if we ever receive convincing evidence that we are not alone.

Could humanity agree on how to respond? How do we combat misinformation? Who gets to speak for Earth? And what can history teach us about one of the biggest discoveries in human history?

Tune in for a fascinating conversation about the future of discovery, responsibility, and our place in the cosmos.

Press release on the updated protocols: https://www.seti.org/news/beyond-disclosure-day/

Press release on the Discovery and Futures Lab: https://www.seti.org/news/seti-institute-launches-discovery-and-futures-lab-to-explore-the-human-dimensions-of-life-beyond-earth/

What can a visitor from another star system teach us about our own cosmic neighborhood?

Join host Dr. Franck Marchis and guest Dr. Cecilia Tubiana (INAF) for a conversation about interstellar comet 3I/ATLAS and the surprising observations made by ESA's Jupiter Icy Moons Explorer (Juice) during its rare close encounter with this ancient traveler.

In November 2025, Juice turned five of its instruments toward 3I/ATLAS, capturing a once-in-a-lifetime dataset as the comet passed through the Solar System. From massive water vapor outgassing to tails stretching millions of kilometers into space, the observations are helping scientists better understand what this object is made of, how it behaves near the Sun, and what it can tell us about planetary systems beyond our own.

We'll talk about: • how Juice managed to observe 3I/ATLAS while en route to Jupiter • what scientists learned about the comet's water, dust, and composition • why this interstellar object looks surprisingly familiar—and why that's exciting • how these observations support planetary defense and future spacecraft science • what 3I/ATLAS may reveal about the early history of the Milky Way

Press release: https://www.esa.int/Science_Exploration/Space_Science/Juice/Five_things_Juice_has_revealed_about_Comet_3I_ATLAS

In this episode of SETI Live, Jeremy Webb joins Moiya McTier to discuss Life is But a Stream: The Distribution of Planetary Systems Along Stellar Streams and Their Properties.

Stellar streams are elongated structures of stars moving through the Milky Way, often shaped by tidal interactions and the galaxy's gravity. Jeremy Webb's research explores how planetary systems are distributed along these streams and what their properties can reveal about planet formation and evolution in dynamic galactic environments.

Together, they'll dive into how astronomers trace stellar streams, how planetary systems survive and evolve within them, and what this research tells us about the broader history of our galaxy.

Read the paper: https://iopscience.iop.org/article/10.3847/1538-4357/ae67fd

What happens when hundreds of thousands of volunteers team up with NASA to explore the sky? In the case of Backyard Worlds: Planet 9, thousands of new brown dwarfs.

NASA citizen scientists have helped discover more than 3,000 brown dwarfs, effectively doubling the known population of these mysterious objects over the past decade. These discoveries are helping astronomers better understand the boundary between planets and stars, revealing rare ultra-cool worlds, extreme T subdwarfs, and even brown dwarfs that may host aurorae.

Dr. Lauren Sgro and special guest Dr. Adam C. Schneider (United States Naval Observatory) discuss how citizen scientists made these discoveries, why brown dwarfs are so difficult to detect, and what this growing catalog is teaching us about our galactic neighborhood.

Press release: https://science.nasa.gov/get-involved/citizen-science/nasa-volunteers-double-known-population-of-brown-dwarfs/

Paper: https://iopscience.iop.org/article/10.3847/1538-3881/ae5b60

Backyard Worlds: Planet 9: https://www.zooniverse.org/projects/marckuchner/backyard-worlds-planet-9

What does intelligence sound like?

For decades, scientists studying whales and dolphins have uncovered remarkable evidence of sophisticated communication, social complexity, self-awareness, and cognition in cetaceans. Today, a new generation of research tools and analytical methods is opening an even deeper window into the sounds and possible language structures of these extraordinary marine mammals.

Join SETI Institute President and CEO Bill Diamond for a fascinating conversation with 2026 Drake Award recipient Dr. Lori Marino as they explore the cutting edge of dolphin and whale communication research, what these discoveries reveal about intelligence on Earth, and how they connect to broader questions at the heart of SETI.

Together they'll discuss: 🔹 How scientists study whale and dolphin communication 🔹 New breakthroughs in cetacean cognition research 🔹 Whether dolphin and whale sounds may contain language-like structure 🔹 The ethical and philosophical implications of understanding non-human intelligence 🔹 What studying intelligence on Earth can teach us about detecting intelligence elsewhere in the universe

Dr. Lori Marino is a neuroscientist, expert in animal behavior and intelligence, and the 2026 recipient of the SETI Institute's Drake Award.

Read the announcement: https://www.seti.org/news/seti-institute-names-lori-marino-as-2026-drake-award-recipient/

How do you study volcanoes on a planet more than 200 light-years away?

Join us for SETI Live as host Moiya McTier talks with planetary scientist Claire Marie Guimond about the extreme lava world K2-141 b—a rocky exoplanet so hot that parts of its surface may be covered in oceans of molten rock.

Using advanced mantle convection models, Claire and her collaborators investigated how heat moves through the planet's interior and where volcanic hotspots may form—including on the planet's permanent nightside. Together, we'll explore what these models reveal about alien geology, how lava worlds compare to Earth, and what volcanism might mean for a planet's long-term evolution.

We'll also dive into how scientists can study volcanic activity on distant worlds, what makes lava planets important to planetary science, and what questions remain about one of the galaxy's most extreme exoplanets.

Paper: https://academic.oup.com/mnras/article/547/3/stag390/8501203

(Recorded live 7 May 2026.)

A newly identified class of distant galaxies—nicknamed "little red dots"—may be doing something extraordinary: quietly creating the raw ingredients for life.

Join host Dr. Simon Steel as we explore groundbreaking new research from Dr. Remo Ruffini and Dr. Yu Wang from the International Center for Relativistic Astrophysics Network (ICRANet), suggesting that these compact, enigmatic galaxies could act as "molecular islands," forming complex organic molecules in environments surprisingly calm compared to the chaotic early universe.

- What makes these galaxies so special? - How can such small, distant objects produce life's building blocks? - And what does this mean for the possibility that life's chemistry is widespread across the cosmos?

We'll break down the science behind these "galactic oases," how they were discovered, and why they may reshape how we think about the origins of life in the universe.

Press release (pdf): https://www.icranet.org/LRDs-Molecular-Islands-Press-Release.pdf

Paper: https://iopscience.iop.org/article/10.3847/2041-8213/ae3a76

(Recorded live 30 April 2026.)

Where should we actually be looking for life beyond Earth?

Astronomers have identified 45 Earth-like worlds that could be among the most promising places to search for biosignatures—chemical signs of life in distant atmospheres. Inspired by the idea of a real-life "Project Hail Mary," this research helps narrow the search for habitable planets and guides future telescopes toward the most compelling targets.

Join SETI Institute planetary astronomer Dr. Franck Marchis and guests Dr. Lisa Kaltenegger and Abigail Bohl from Cornell University as they explore:

- How scientists define an "Earth-like" world - What makes a planet a strong candidate for life - How these 45 planets were selected - What telescopes, like the James Webb Space Telescope, can (and can't) detect - What this means for the future of SETI and exoplanet exploration

Are we closer than ever to finding life—or just getting better at knowing where to look?

Press release: https://ras.ac.uk/news-and-press/research-highlights/best-places-look-alien-life-scientists-identify-45-earth-worlds

Paper: https://academic.oup.com/mnras/article/547/3/stag028/8526432

(Recorded live 17 April 2026.)

Join us for a special episode of SETI Live as host Lauren Sgro sits down with astronomer and entrepreneur Franck Marchis to explore the newly launched SkyMapper platform—now open to the public.

SkyMapper is a global, decentralized network of telescopes and all-sky sensors that connects professional observatories, citizen scientists, and classrooms around the world. In this live, interactive session, Lauren and Franck will go beyond the basics and show how SkyMapper works in real time—from navigating the interface and accessing live sky data to triggering observations and joining active discoveries.

We'll talk about what this launch means for the future of astronomy, how people are already using the platform, and why a continuously connected view of the sky could transform research, education, and public participation in science. We'll also highlight the SETI Institute's role in building this new global observing network.

✨ Ready to explore the universe yourself? This is your chance to see SkyMapper in action—and learn how to get involved.

📚 Learn more: www.skymapper.io

👋 Join the community: https://t.me/skymapper_community

(Recorded live 13 April 2026.)

Astronomers may have just witnessed the aftermath of a massive planetary collision in another star system—offering a rare glimpse into how worlds are destroyed… and possibly reborn.

Join host Dr. Moiya McTier and guest Anastasios Tzanidakis (University of Washington) as they break down new evidence suggesting that two large planetary bodies recently crashed into each other. What does this tell us about how planets form and evolve? How common are these catastrophic events? And could collisions like this help explain the chaotic early history of our own solar system?

From cosmic debris clouds to planetary recycling, we'll explore one of the most dramatic processes shaping worlds across the galaxy.

Press release: https://www.washington.edu/news/2026/03/11/uw-astronomers-spot-planet-collision-evidence/

Paper: https://iopscience.iop.org/article/10.3847/2041-8213/ae3ddc

(Recorded live 2 April 2026.)

As NASA prepares to return humans to the Moon with Artemis II, what does it really take to live and work on the lunar surface?

Join host Simon Steel and planetary scientist Pascal Lee as they explore the science and strategy behind humanity's next giant leap. From cutting-edge spacesuit design and testing to the challenge of choosing where astronauts will land, this conversation dives into what comes next for lunar exploration.

We'll also explore:

- The mystery and importance of permanently shadowed regions - Evidence for water ice on the Moon—and why it matters - How Artemis is paving the way for future missions from the Moon to Mars

Artemis II is more than a mission—it's a proving ground for the future of human exploration.

Haughton Mars Project: https://www.marsinstitute.no/hmp

(Recorded live 26 March 2026.)

How do scientists actually search for extraterrestrial intelligence?

Astronomer, professor, and Drake Award winner Jason Wright joins host Beth Johnson on SETI Live to discuss his new textbook, The Search for Extraterrestrial Intelligence: Theory and Practice. The book brings together the science, methods, and history of SETI into a single framework for students and researchers.

SETI has evolved dramatically in the past few decades—from early radio searches to modern investigations of technosignatures, including laser signals, infrared waste heat, and other possible evidence of advanced civilizations.

In this conversation, we explore: Why SETI now deserves a full academic textbook The many ways scientists search for alien technology The history and philosophy behind the field What would actually count as a real detection How researchers are training the next generation of SETI scientists

Learn more about The Penn State Extraterrestrial Intelligence Center: https://www.pseti.psu.edu/

Access the textbook: https://iopscience.iop.org/book/mono/978-0-7503-4796-9

(Recorded live 19 March 2026.)

Saturn's largest moon may have had a violent birth.

New research led by SETI Institute scientist Matija Ćuk proposes that Titan formed when two earlier Saturnian moons collided and merged hundreds of millions of years ago. This dramatic event may explain several long-standing mysteries in the Saturn system—including Titan's unusual orbit, the origin of the strange tumbling moon Hyperion, and even the relatively young age of Saturn's iconic rings.

Using computer simulations, researchers found that a once-stable Saturnian moon system may have become unstable, sending an outer moon on a collision course with Titan. The merger would have resurfaced Titan—erasing many ancient craters—and scattered debris that later formed Hyperion. The resulting changes to Titan's orbit could have destabilized smaller inner moons, triggering collisions that eventually created Saturn's rings.

Join SETI Institute Social Media Manager Beth Johnson and planetary dynamicist Matija Ćuk as they explore this new model for the Saturn system's evolution, what clues led scientists to propose a moon-moon merger, and how future missions—like NASA's Dragonfly mission to Titan—might test this dramatic hypothesis.

Could Titan really be the survivor of an ancient cosmic crash?

📄 Paper: https://iopscience.iop.org/article/10.3847/PSJ/ae422c

📰 Press release: https://www.seti.org/news/saturns-moon-titan-could-have-formed-in-a-merger-of-two-old-moons/

(Recorded live 12 March 2026.)

Astronomers have unveiled a novel technique for detecting faint signals from stellar and exoplanetary systems — potentially opening new pathways in the search for extraterrestrial technology and natural astrophysical phenomena alike.

In this episode of SETI Live, host Moiya McTier sits down with radio astronomer Cyril Tasse to explore the method described in Nature Astronomy. How does it work? Why is it different from traditional radio searches? And what kinds of signals could it reveal that we've been missing?

Radio waves from distant stars and planets are incredibly faint and often buried in noise. This new approach rethinks how we process and interpret complex data, potentially improving sensitivity to subtle, structured signals.

RIMS press release: https://observatoiredeparis.psl.eu/the-detection-of-radio-bursts.html

RIMS paper: https://www.nature.com/articles/s41550-025-02757-7

Stellar storm press release: https://observatoiredeparis.psl.eu/evidence-of-a-massive-stellar.html

CME video: https://youtu.be/bHlOYFn0RUM

(Recorded live 5 March 2026.)

Dr. Franck Marchis, Director of Citizen Science at the SETI Institute and co-founder and Chief Executive Officer of SkyMapper, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, update us about citizen science with the Unistellar network in partnership with the SETI Institute. They discuss making 15,000 observations in 2025, pending confirmation of a planet candidate, Comet 29P outbursting, observing rocket bodies, and preparing to observe Artemis II. They also answer your questions about our program and discuss recent highlights. (Recorded live 27 February 2026.)

Astronomers may have found the missing link in the story of the Milky Way's most common planets.

In this SETI Live, host Moiya McTier is joined by exoplanet scientist John H. Livingston to explore a new discovery that helps connect the dots between small rocky worlds like Earth and the larger "sub-Neptunes" that dominate our galaxy.

Using cutting-edge observations and statistical analysis, researchers have identified a population of planets that appears to bridge a long-standing gap in our understanding of planetary formation. For years, astronomers have known that planets of sizes between Earth and Neptune are incredibly common—but their origins and evolutionary paths have remained puzzling. This new result may finally clarify how these worlds form, evolve, and sometimes transform.

What does this mean for:

• How do planetary systems assemble?

• Why does our Solar System look so unusual?

• The search for habitable worlds beyond Earth?

Join us as we break down the science, the methods, and the bigger implications for exoplanet research and the search for life.

Press release: https://www.abc-nins.jp/en/2026/01/08/10010/

Paper: https://www.nature.com/articles/s41586-025-09840-z

(Recorded live 26 February 2026.)

Our Cosmic Consciousness residency artists daniela brill estrada, Bart Kuipers, and Julie-Michèle Morin, discuss an art-science collaboration that imagines how language might emerge from alien worlds. Hosts: Bettina Forget and Cosmic Consciousness residency advisor Gregory Betts.

Join SETI AIR program Director Bettina Forget for a conversation with Cosmic Consciousness artists in residence daniela brill estrada, Bart Kuipers, and Julie-Michèle Morin, joined by residency advisor Gregory Betts. Together, they will discuss Exoplanetary Poetry, an art-science collaboration that imagines how language might emerge from alien worlds.

Using atmospheric data from real exoplanets, the team trains an artificial intelligence to write poems alongside human collaborators. The resulting texts are translated back into chemistry, forming multisensory installations where reactions generate visual forms, textures, and scent. How can molecules become metaphors? What does it mean to co-author with a nonhuman intelligence shaped by planetary science? And can poetry help us think differently about life beyond Earth?

Exoplanetary Poetry: https://exoplanetarypoetry.space/

Sara Walker: https://search.asu.edu/profile/1731899

Learn more about the SETI AIR program: https://www.seti.org/air/

(Recorded live 19 February 2026.)

Are we finally uncovering hidden pulsars at the center of the Milky Way? Join host Beth Johnson and William J. Welch Postdoctoral Fellow Karen Perez for a deep dive into a newly announced discovery of a possible pulsar near our galaxy's core. Using data from the Breakthrough Listen Deep Pulsar Survey and observations with the NSF Green Bank Telescope, researchers are probing one of the most extreme and mysterious regions in the Milky Way. The Galactic Center is a chaotic environment dominated by the supermassive black hole Sagittarius A*. For decades, astronomers have predicted that many pulsars should orbit this region — yet very few have been detected. Why are they so hard to find? And what would discovering more of them mean for testing gravity, mapping the Galactic Center, and understanding extreme astrophysics?

Press release: https://news.columbia.edu/news/researchers-announce-discovery-possible-pulsar-milky-ways-center

Paper: https://iopscience.iop.org/article/10.3847/1538-4357/ae336c

Datasets: https://www.physics.ox.ac.uk/research/group/breakthrough-listen/deep-pulsar-survey-results-galactic-center

(Recorded live 12 February 2026.)

Humanity is heading back to the Moon—and Artemis II is the mission that makes it real. In this SETI Live, host Simon Steel is joined by Dr. Caitlin Ahrens, assistant research scientist at NASA Goddard, to explore how Artemis II will prepare the way for future astronaut missions. Artemis II isn't landing on the Moon—but it is laying the groundwork. From mapping the lunar environment to understanding how radiation, extreme cold, and surface conditions affect both spacecraft and humans, this mission is a crucial scouting expedition. The data gathered will directly inform how astronauts live, work, and explore when boots return to lunar soil. Together, we'll unpack how lunar scientists are using Artemis II to test assumptions, close knowledge gaps, and turn decades of robotic exploration into a sustainable human presence beyond Earth. This is the Moon as a proving ground—not just for technology, but for the future of deep-space exploration. (Recorded live 2 February 2026.)

In this SETI Live episode, host Simon Steel (Deputy Director of the Carl Sagan Center) chats with evolutionary biologist Philipp Schiffer (Worm Lab) about one of the most astonishing discoveries in modern biology: scientists have revived a microscopic worm that had been frozen in Siberian permafrost for roughly 46,000 years. These nematodes entered a state of cryptobiosis — a kind of biological "pause" — and came back to life when gently thawed in the lab. They didn't just wiggle; they fed, reproduced, and gave us a window into life's extreme resilience. Simon and Philipp dive into the role of cryptobiosis, how radiocarbon dating places these organisms back in the late Pleistocene when woolly mammoths roamed, and what it means for the limits of suspended animation. This is biology meeting deep time — and you're invited to stretch your imagination along with the science. (Recorded live 29 January 2026.)

For more than two decades, millions of volunteers turned their home computers into a planet-scale telescope, donating idle processing power to the search for extraterrestrial intelligence through SETI@home. That effort ended in 2020—but the data never stopped speaking. Now, UC Berkeley scientists have taken a fresh, rigorous look at the vast SETI@home archive and identified around 100 intriguing signals that warrant closer scrutiny. In this SETI Live, host Beth Johnson is joined by Eric Korpela (UC Berkeley), one of the scientists behind the original SETI@home project and the new analyses. Together, they'll unpack how citizen science made this work possible, what these signals actually are (and are not), how researchers sort cosmic noise from something genuinely interesting, and what this next phase of investigation means for the future of SETI. Are any of these signals evidence of technology beyond Earth? Probably not—but "probably" is exactly where the science gets interesting. Join us for a deep dive into distributed computing, signal vetting, and what happens after the screensavers stop. (Recorded live 22 January 2026.)

Using early data from the European Space Agency's Euclid space telescope, astronomers have analyzed over one million galaxies to test a long-standing idea in astrophysics: that galaxy mergers help trigger the growth of supermassive black holes. In this SETI Live, host Dr. Moiya McTier will explore two new Euclid studies that combine vast sky surveys, machine learning, and multi-wavelength observations to uncover when and why active galactic nuclei (AGN) ignite. The results show that galaxies in the midst of mergers are far more likely to host actively feeding black holes — and that the brightest AGN are almost always found in cosmic collisions. Dr. McTier will be joined by lead authors Dr. Berta Margalef-Bentabol, Dr. Lingyu Wang, and Dr. Antonio la Marca from the Space Research Organisation Netherlands (SRON). They will discuss how Euclid identifies merging galaxies at scale, how researchers measure the black hole's contribution to a galaxy's light, and what this tells us about the coevolution of galaxies and their central black holes. We'll also look ahead to what future Euclid data could reveal as the survey expands to billions of galaxies. (Recorded live 15 January 2026.)

2026 is a pivotal year for space science. From humans returning to the Moon to new telescopes opening more expansive windows on the universe, this year marks a turning point in how we explore space—and why it matters. SETI Institute communications specialist Beth Johnson and Senior Planetary Astronomer Franck Marchis will tour the biggest missions, milestones, and moments shaping space science in 2026. We'll look at crewed lunar exploration, robotic missions to asteroids and planets, next-generation observatories, and the celestial events unfolding above our own skies. Along the way, we'll talk about what these missions are designed to discover, the questions they're trying to answer, and how they fit into the bigger story of humanity's search to understand our place in the cosmos. Whether you follow every launch or love looking up at the night sky, this episode will connect the dots between ambitious engineering, fundamental science, and the sense of wonder that keeps us exploring. (Recorded live 8 January 2026.)

We're going live with Dr. Cynthia Phillips, Europa Clipper Project Staff Scientist and Science Communications Lead, from NASA's Jet Propulsion Laboratory, to explore a surprising and exciting new chapter in comet science. Recently, the Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft made unique observations of the interstellar comet 3I/ATLAS at a time when Earth- and Mars-based telescopes couldn't see it. In this livestream, communications specialist Beth Johnson and Dr. Phillips will unpack what these observations mean for our understanding of interstellar visitors and how instruments designed for one mission can yield discoveries well beyond their original goals. We'll lay out: • How Europa-UVS captured data on 3I/ATLAS's tails and coma while other assets were blocked by the Sun, bridging a critical observational gap. • What signatures of oxygen, hydrogen, and dust the instrument detected, and why that matters. • Why observations from unexpected vantage points — like those aboard Europa Clipper — can deepen our picture of interstellar objects. • What this tells us about the composition, activity, and evolution of a comet that formed around another star. Interstellar comets like 3I/ATLAS are cosmic time capsules from beyond our solar system, carrying clues about alien planetary systems. Capturing data from a spacecraft not originally tasked with comet science is a testament to scientific adaptability and ingenuity — and it gives researchers a rare look inside the workings of an object that has journeyed across the galaxy to visit us. Press release: https://science.nasa.gov/blogs/europa-clipper/2025/12/18/nasas-europa-clipper-observes-comet-3i-atlas/ (Recorded live 19 December 2025.)

Get ready for a fascinating deep dive into one of the biggest questions in astrobiology: How common are biological extraterrestrial intelligences in the Milky Way? Host Simon Steel, Deputy Director of the Carl Sagan Center for Research, is joined by Manuel Scherf and Helmut Lammer (Space Research Institute, Austrian Academy of Sciences) to explore new research that challenges long-held assumptions about "Earth-like" planets and what it really takes for a world to support complex life. Recent work from Scherf, Lammer, and colleagues revisits the idea of Eta-Earth — the number of truly Earth-like habitats in the Galaxy. Their models extend far beyond the basic "habitable zone" and incorporate a suite of filters, including stable atmospheres, oxygen-rich conditions, plate tectonics, subaerial land, and long-term planetary evolution. These filters significantly reduce the number of planets that could potentially host complex or technological life. The study finds that even under generous assumptions, the Milky Way may host at most 60,000 to 250,000 Earth-like habitats — and the number that actually evolve intelligent life could be far smaller. The result? A serious rethink of how rare (or precious) intelligent life might be. Join us as we explore what this means for SETI strategies, exoplanet surveys, and our own cosmic significance. It's a conversation that blends astrophysics, planetary science, and a bit of existential wonder — perfect for anyone curious about where life fits into the grand structure of the cosmos. Paper: https://www.liebertpub.com/doi/10.1089/ast.2023.0076 Conference Abstract: https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-1512.html (Recorded live 8 December 2025.)

In a special bonus SETI Live, communication specialist Beth Johnson welcomes astronomer and entrepreneur Franck Marchis to introduce SkyMapper, a new global network of smart telescopes and all-sky sensors designed to open the universe to everyone. SkyMapper brings together professional observatories, citizen astronomers, and classrooms into a single, decentralized platform. It enables real scientific discovery — from tracking satellites and meteors to monitoring comets and transient events in real time — while giving students and the public the chance to observe the sky, contribute data, and learn how modern astronomy works. We'll talk about the science, the outreach mission, the importance of the SETI Institute's partnership with SkyMapper, and why a worldwide, always-on view of the sky matters more than ever for research, education, and our shared curiosity. Join us live and discover how you can be part of this new way of exploring the universe. 📚 Learn more about SkyMapper: www.skymapper.io 👋 Join the SkyMapper community on Telegram: https://t.me/skymapper_community ✅ Follow SkyMapper on social media: BlueSky: @skymapper.bsky.social X (formerly Twitter): @Skymapperspace LinkedIn: https://www.linkedin.com/company/skymapper-inc/ Reddit: https://www.reddit.com/r/SkyMapper/ (Recorded live 5 December 2025.)

On this episode of SETI Live, host Moiya McTier welcomes two leading researchers—Gabriele Cugno (University of Zürich) & Sierra L. Grant (Carnegie Institution for Science)—to dive into an extraordinary discovery by the James Webb Space Telescope (JWST): a carbon-rich, moon-forming disk around the distant exoplanetary object CT Cha b, some 625 light-years away. What exactly is a "moon-forming disk"? Why is this discovery a game-changer for our understanding of how moons — and ultimately habitable environments around them — can form? Gabriele and Sierra walk us through spectroscopy, chemistry (including acetylene, benzene, and more), observational challenges, and the big philosophical questions: Could moons be even more common than planets? What does this tell us about our own Solar System's past — and the possibilities for life elsewhere? 📚 For more: NASA Press Release: https://science.nasa.gov/science-research/nasas-webb-telescope-studies-moon-forming-disk-around-massive-planet/ Research Paper: https://iopscience.iop.org/article/10.3847/2041-8213/ae0290 (Recorded live 4 December 2025.)

Join host Beth Johnson for a fascinating episode of SETI Live, featuring planetary scientists Dr Georgina Miles and Dr Carly Howett from the University of Oxford. We'll be unpacking their groundbreaking study showing that Enceladus — one of Saturn's icy moons — may harbor a stable subsurface ocean capable of supporting life. 📄 For more info: The study "Endogenic heat at Enceladus' north pole" has just been published in Science Advances: https://www.science.org/doi/10.1126/sciadv.adx4338 Official press release from the University of Oxford: https://www.ox.ac.uk/news/2025-11-10-saturn-s-icy-moon-may-host-stable-ocean-fit-life-new-study-finds (Recorded live 20 November 2025.)

What happens when a planet is full of water—but too hot for oceans? Meet the "steam worlds," exotic exoplanets wrapped in thick water vapor and boiling at thousands of degrees. These strange worlds may be far from habitable, but they're reshaping how scientists think about planets, water, and where life might exist. In this episode of SETI Live, host Beth Johnson talks with Artem Aguichine of the University of California, Santa Cruz, about his new research modeling the interiors and atmospheres of steam worlds—a class of water-rich sub-Neptunes that could dominate our galaxy. With data from the JWST revealing steam signatures on distant planets, these models are helping scientists decode what's really going on beneath the haze. Join us as we explore: • What defines a "steam world" and how it forms • How water behaves under crushing pressure and searing heat • Why JWST's new observations are changing the game • What these discoveries mean for the future search for life beyond Earth 🔗 Learn more: UCSC Press Release – https://news.ucsc.edu/2025/08/new-model-steam-worlds Research Paper – https://iopscience.iop.org/article/10.3847/1538-4357/add935 (Recorded live 13 November 2025.)

Join SETI Live host Moiya McTier with Néstor Espinoza (STScI) and Ana Glidden (MIT) for a deep dive into the latest JWST observations of TRAPPIST‑1 e, one of the most tantalizing Earth-sized planets in the habitable zone of a nearby star. In this episode, we explore: 🛰 How JWST is peering into TRAPPIST-1 e's atmosphere (or lack thereof). 🔵 Why the planet almost certainly doesn't have a thick hydrogen envelope, ruling out a mini-Neptune-like world. 🪨 The emerging hints of a secondary, heavier atmosphere — or the possibility that it's a bare rock. ⭐️ The challenges posed by stellar activity and their implications for habitability. Get ready for a conversation about exoplanet atmospheres, habitability, and the next steps in characterizing worlds beyond our Solar System. Press release: http://webbtelescope.org/news-2025-109 Papers: Espinoza et al., https://iopscience.iop.org/article/10.3847/2041-8213/adf42e Glidden et al., https://iopscience.iop.org/article/10.3847/2041-8213/adf62e (Recorded live 6 November 2025.)

Dr. Moiya McTier is an astrophysicist, folklorist, and science communicator in New York City who loves planets, galaxy evolution, her cat named Cosmo, and old stories about space. She is also the latest addition to our rotating cast of hosts for SETI Live! Join communications specialist Beth Johnson for an interview to introduce Moiya to the community. So please bring your questions and help us welcome her to the team! (Recorded live 3 November 2025.)

What happens when a visitor from another star system drops by? Join planetary astronomers Franck Marchis and Ariel Graykowski for a special SETI Live all about Comet 3I/ATLAS — only the third known interstellar object ever detected! Astronomers around the world, including citizen scientists in the Unistellar Network, are racing to learn as much as possible about this rare cosmic traveler. 3I/ATLAS is swinging through our neighborhood, reaching perihelion on October 30, 2025, just inside the orbit of Mars — a front-row seat for spacecraft like Lucy and Psyche. While it's currently hidden behind the Sun, it won't stay that way for long. By December 2025, 3I/ATLAS will reappear, ready for a fresh round of observations from Earth and its Lagrange-point observatories. We'll dive into what scientists have discovered so far, how they're studying this interstellar visitor, and what it might reveal about the chemistry and dynamics of other star systems. Don't miss it — interstellar comets don't come around every day! (Recorded live 31 October 2025.)

Join host Beth Johnson on SETI Live as she talks with Dr. Eric Boyd from the University of Montana about a groundbreaking discovery: microbes that can breathe in two ways at once! These extraordinary bacteria simultaneously perform both aerobic (oxygen-based) and anaerobic (sulfur-based) respiration, challenging everything we thought we knew about cellular life. Discover how this incredible metabolic flexibility reshapes our understanding of life on Earth, inspires biotechnology innovations, and even informs the search for extraterrestrial life. 🔬 Featured Research: Quanta Magazine overview: https://www.quantamagazine.org/the-cells-that-breathe-two-ways-20250723/ Original study: https://www.nature.com/articles/s41467-025-56418-4 Dr. Boyd's website: http://geoboydology.com/ 💡 Learn how microbes survive extreme environments and why this discovery matters for science and space exploration. (Recorded live 30 October 2025.)

Could Uranus's moon Ariel have once harbored a vast, deep ocean beneath its icy crust—perhaps even one that still lingers today? In this episode of SETI Live, host Beth Johnson welcomes Caleb Strom (University of North Dakota) and Alex Pathoff (Planetary Science Institute) to discuss new research revealing evidence that Ariel may have once held a subsurface ocean over 170 kilometers deep. Using geological mapping and tidal‐stress modeling, the team shows how ancient fractures and ridges on Ariel's surface hint at powerful internal forces and a dynamic, watery past. This discovery expands the growing family of "ocean worlds"—planets and moons that may have once supported (or could still support) conditions for life. What does this mean for future exploration of the Uranus system, and what could we learn by going there? 🔗 Press release: https://www.psi.edu/blog/evidence-of-a-past-deep-ocean-on-uranian-moon-ariel/ 📄 Paper: https://www.sciencedirect.com/science/article/abs/pii/S0019103525003707 (Recorded live 23 October 2025.)

Join Beth Johnson for a thought-provoking conversation with Professor Dagomar Degroot, an environmental historian at Georgetown University. They delve into the themes of his new book, Ripples on the Cosmic Ocean, set to be released on October 28, 2025. Ripples on the Cosmic Ocean offers a sweeping history of human encounters with the solar system. Professor Degroot reimagines the solar system as a dynamic network of interconnected systems, exploring how cosmic events and environments have influenced human history and understanding. Drawing inspiration from James Lovelock's Gaia hypothesis, he treats the entire solar system as a network of interconnected systems of exchange and influence, all of which shape even the most innocuous facts of life on Earth. 📘 Order the book: https://www.hup.harvard.edu/books/9780674986503 (Recorded live 28 October 20250.)

Do Aliens Speak Physics?: And Other Questions about Science and the Nature of Reality (Whiteson & Warner, 2025) is a mind-bending exploration into what it would mean, scientifically and philosophically, for humans to communicate with an extraterrestrial intelligence through the language of physics. Daniel Whiteson, a particle physicist, and Andy Warner tackle deep questions: Are concepts like "number," "space," "time," and "laws of nature" universal, or are they shaped by our biology, culture, and perception? What assumptions do we make that might not translate to a species evolved under utterly different conditions? The book pushes us to examine where physics ends and human perspective begins, to reflect on whether alien minds might think mathematics differently, sense reality differently, or have radically different "basic science." Join us on SETI Live as communications specialist Beth Johnson speaks with co-author Daniel Whiteson about the surprising places he found ambiguity, what assumptions underlie science as we know it, and what our notion of physics might reveal — or blind us to — when grappling with alien intelligence. Learn more about the book: https://sites.uci.edu/alienphysics/ (Recorded live 16 October 2025.)

How do planets start? Host Simon Steel (SETI Institute) speaks with Melissa McClure (Leiden University), lead author of a new study that caught the earliest spark of planet formation. Using JWST and ALMA, the team detected silicon monoxide (SiO)—both gaseous and likely crystalline—and pinpointed where hot, rock-forming minerals are condensing inside the protoplanetary disk of HOPS-315, ~1300 light-years away in Orion. They also map the action to a belt-like region similar to our Solar System's asteroid belt. What does SiO reveal about shocks, heat, and the first solids that seed planets? Join us to unpack the chemistry, the physics, and the cosmic "baby book" of a solar system in the making. ESO press release: https://www.eso.org/public/unitedkingdom/news/eso2512/ Nature paper: https://www.nature.com/articles/s41586-025-09163-z (Recorded live 9 October 2025.)

The Sun is restless again! A massive coronal hole has opened up, sending streams of solar wind racing toward Earth. These high-speed particles not only light up our skies with dazzling auroras but can also affect satellites, power grids, and communications. In this special SETI Live, heliophysicist Dr. Becca Robinson (SETI Institute) joins host Simon Steel (Deputy Director of the Carl Sagan Center at the SETI Institute) to explain what coronal holes are, how they form, and what their impacts mean for both our technology and our understanding of the Sun. Join us on October 7 at 2:30 pm PT for a deep dive into the science of solar storms, space weather, and the mysteries of our nearest star. Aurora videos courtesy of Vincent Ledvina, The Aurora Guy, https://theauroraguy.com/ Participate in citizen science at https://aurorasaurus.org/ Learn more about the MUSE mission: https://muse.lmsal.com/ (Recorded live 7 October 2025.)

Join host Beth Johnson and guest Dr. Sam Courville, lead author of a new study on Ceres, as they dive into the possibility that the dwarf planet may have had the energy needed to support habitability for much longer than once believed. Using data from NASA's Dawn mission, researchers uncovered evidence of persistent geologic activity, brine movement, and long-lived energy sources beneath Ceres' icy surface. Could this small world in the asteroid belt have been more habitable than we ever imagined? Press release: https://www.jpl.nasa.gov/news/nasa-ceres-may-have-had-long-standing-energy-to-fuel-habitability/ Paper: https://www.science.org/doi/10.1126/sciadv.adt3283 (Recorded live 2 October 2025.)

Join host Dr. Franck Marchis and guest Dr. Andy Rivkin (Johns Hopkins University Applied Physics Laboratory) for a discussion on asteroid 2024 YR4 and its potential impact on the Moon. Thanks to new observations with the James Webb Space Telescope (JWST), scientists have refined the asteroid's orbit and determined there is about a 4% chance it could strike the Moon in December 2032. While there is no risk to Earth, a lunar impact could create a crater nearly a kilometer wide and send debris into space—possibly affecting satellites or even producing a visible meteor shower. In this episode, we'll explore how JWST contributed to narrowing the odds, what such an impact would mean for lunar science, and how planetary defense research helps us better understand and prepare for near-Earth objects. NASA Blog: https://science.nasa.gov/blogs/planetary-defense/2025/06/05/nasas-webb-observations-update-asteroid-2024-yr4s-lunar-impact-odds/ (Recorded live 25 September 2025.)

What happens after we discover life beyond Earth? The question is no longer "if," but "when"—and how humanity responds could shape our future. Host and planetary astronomer Franck Marchis welcomes Martin Dominik, one of the authors of a new white paper on the societal, political, and philosophical challenges we'll face once alien life is confirmed. From public communication and policy to our collective sense of identity, this discussion explores how to prepare for the biggest discovery in human history. 📄 Read the paper: https://arxiv.org/abs/2507.11587 📰 Universe Today article: https://www.universetoday.com/articles/scientists-are-planning-for-life-after-finding-aliens (Recorded 18 September 2025.)

Join communications specialist Beth Johnson and Dr. Charles-Édouard Boukaré (York University) as they dive into new research on molten rocky exoplanets—worlds so hot that their surfaces are oceans of magma. This international study, led by York University, sheds light on how these fiery planets form, evolve, and what their extreme environments can teach us about the diversity of planetary systems. From the physics of molten mantles to what telescopes like JWST might reveal about their atmospheres, we'll explore the cutting-edge science that's reshaping our understanding of exoplanets beyond our solar system. 📄 Learn more: Press release → https://www.yorku.ca/news/2025/07/29/international-research-lead-by-york-u-prof-sheds-light-on-molten-rocky-exoplanets/ Paper → https://www.nature.com/articles/s41550-025-02617-4 (Recorded live 11 September 2025.)

Saturn's largest moon, Titan, is a world of methane rivers and lakes, icy boulders, sandy dunes, and a vast subsurface ocean. Could this distant world harbor life? A new study led by Dr. Antonin Affholder, now a fellow at ETH Zurich, suggests that Titan's ocean might support life—but only in the tiniest amounts, making it incredibly hard to find. Join communications specialist Beth Johnson as she chats with Dr. Affholder to explore what this means for the search for life beyond Earth, why organics on Titan may not provide enough fuel, and how NASA's Dragonfly mission might help answer these questions. (Recorded live 4 September 2025.)

Join us for a special livestream featuring Dr. Abel Méndez from the University of Puerto Rico at Arecibo, hosted by SETI Institute researcher Dr. Lauren Sgro. They will discuss the latest on LaserSETI, the all-sky project searching for optical technosignatures, including exciting updates from the new installation in Puerto Rico. This special "LaserSETI Live" will also dive into Méndez's new study on the legendary Wow! Signal, in which he and his team revisit one of the most intriguing mysteries in the search for extraterrestrial intelligence with fresh analysis and new insights. This event connects Puerto Rico's rich legacy in radio astronomy with today's cutting-edge search for signals of life beyond Earth, so don't miss this livestream! (Recorded live 30 August 2025.)

Join us for a 30-minute livestream with Simon Steel, Deputy Director of the Carl Sagan Center for Research at the SETI Institute, and Dr. Sanne Bloot, lead author of a recent study published in Astronomy & Astrophysics. They will discuss one of the universe's most puzzling new discoveries: a white dwarf that emits highly polarized radio pulses in a strange, patterned rhythm. (Recorded live 28 August 2025.)

Join communications specialist Beth Johnson for a conversation with Dr. Anastasia Yanchilina, Frank Drake Postdoctoral Fellow at the SETI Institute, as we explore how life might emerge and/or be mistaken for in environments beyond Earth. Dr. Yanchilla studies abiotic mineral structures, or "chemical gardens," that resemble biological life but form entirely through non-living processes. By recreating these systems under conditions similar to hydrothermal vents on ocean worlds such as Enceladus and Mars, she investigates how to distinguish between life and non-life, and what this means for the origin of life on Earth. We'll discuss how minerals, organics, and even UV light interact in these experiments, and how this research helps us refine the search for biosignatures across the solar system. (Recorded live 21 August 2025.)

Join Dr. Franck Marchis, Director of Citizen Science at the SETI Institute, Chief Science Officer and co-founder of Unistellar, and co-founder and Chief Executive Officer of SkyMapper, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We will talk about amateur astronomer observations of Comet 3I/ATLAS, a disintegrating exoplanet, asteroid (762) Pulcova, and the satellite Tanager. We will also answer your questions about our program from the Unistellar community page and discuss recent highlights. (Recorded live 14 August 2025.)

Join astronomers Franck Marchis (SETI Institute) and Julien Girard (Space Telescope Science Institute) for a 30-minute live discussion unpacking NASA's exciting new findings from JWST. Just announced, JWST has revealed strong evidence of a Saturn-mass gas giant orbiting Alpha Centauri A—the Sun's nearest solar twin—located just 4 light-years away. The planet appears to orbit at about 1 to 2 AU, placing it within the star's habitable zone, though as a gas giant, it's not likely habitable itself. (Recorded live 8 August 2025.)

Join us for a 30-minute live conversation with astronomer Dr. Rosemary E. Pike, lead author of a groundbreaking new study that reveals the discovery of a rare and distant object orbiting in resonance with Neptune. Hosted by Beth Johnson of the SETI Institute, this stream will explore the science behind this unusual trans-Neptunian object, what it tells us about the early solar system, and why its orbital alignment is so surprising. (Recorded live 7 August 2025.)

Join communications specialist Beth Johnson for a live interview with astrophysicist Marc Hon (MIT), lead author of a new study revealing one of the most extreme exoplanets ever discovered — a small, rocky world that's literally disintegrating as it orbits its star. BD+05 4868 b is a Mercury-sized planet just 140 light-years away that's orbiting so close to its star, it's roasting at around 1650°C. The heat is intense enough to vaporize the planet's rocky surface, creating a massive comet-like tail of mineral dust stretching millions of kilometers across space. This rare discovery — only the fourth known disintegrating planet — offers scientists an unprecedented opportunity to study the geology of an alien world, and upcoming JWST observations could even reveal the chemical makeup of its interior. (Recorded live 17 July 2025.)

Comets are cosmic time capsules, but some carry stories from far beyond our Solar System. Join us for a live discussion on Comet 3I/ATLAS, the third known interstellar object to visit our cosmic neighborhood. Host Simon Steel, Deputy Director of the Carl Sagan Center at the SETI Institute, will be joined by a panel of experts to explore what makes this comet unique, how scientists are studying it, and what its presence means for our understanding of planetary systems beyond our own.

Guests include:

Don't miss this chance to learn how astronomers are racing to study this rare visitor before it slips back into the void.

(Recorded live 11 July 2025.)

Join planetary scientists Beth Johnson and Ian Pamerleau, lead author of a groundbreaking new Nature Astronomy study, for a deep dive into the icy mysteries of Ceres—the largest object in the asteroid belt and the only dwarf planet to be orbited by a spacecraft. While Ceres shows signs of an ice-rich interior, its heavily cratered surface doesn't behave like soft, ice-laden terrain. So what gives? To solve the puzzle, Pamerleau and colleagues used simulations and an updated model of how impure ice deforms. Their work reveals that Ceres once hosted a subsurface ocean that froze from the top down, concentrating impurities as it solidified and creating a gradient from ice-rich surface layers to a rockier interior. (Recorded live 10 July 2025.)

How does life begin? This intriguing question touches on science, philosophy, and the imagination. Artist and INCUBATOR Art Lab Director Jennifer Willet created an artwork that visualizes the theories of SETI Institute Drake Award recipients Dr. David Deamer and Dr. John Baross. Willet's work, Dreams of Biogenesis, imagines the birth of life on our planet as a reverie of molecules, cells, micro and multicellular organisms assembling and evolving under unique environmental conditions. Join SETI AIR Director Bettina Forget and Jennifer Willet for a conversation about creative research that combines fine arts practices with applied biotechnologies. INCUBATOR Art Lab: https://incubatorartlab.com/ (Recorded live 3 July 2025.)

Last week, the NSF–DOE Rubin Observatory released its First Look images, including stunning views of the Trifid and Lagoon nebulae, an astounding Cosmic Treasure Chest of stars and galaxies, and a "swarm" of newly discovered asteroids. Captured in a mere ten hours of observing time, this preview gave us a taste of what is to come for the groundbreaking observatory. As the press release states, "Rubin's innovative 8.4-meter telescope has the largest digital camera ever built, which feeds a powerful data processing system. Later in 2025, Rubin will begin its primary mission, the Legacy Survey of Space and Time (LSST), in which it will ceaselessly scan the sky nightly for 10 years to precisely capture every visible change." Join SETI Institute communications specialist Beth Johnson and CEO of the LSST Discovery Alliance Beth Willman in a special SETI Live event, talking about these First Look images, the future of the LSST mission, and what all the new data could mean for astrobiology and planetary defense. Press release: https://rubinobservatory.org/news/first-imagery-rubin (Recorded live 1 July 2025.)

A major new exhibition at the Natural History Museum in South Kensington, Space: Could Life Exist Beyond Earth?, runs from May 17, 2025, to January 4, 2026, and will feature a complete LaserSETI instrument on display. The exhibit explores one of humanity's most profound questions: Are we alone in the universe? The exhibition brings together cutting-edge science, captivating artifacts, and the latest research in astrobiology, exoplanets, and the search for extraterrestrial intelligence. LaserSETI represents a new frontier in SETI, using a global network of instruments to continuously scan the night sky for brief laser pulses—potential signs of technology from beyond Earth. The first two sites were in California, at the Ferguson Observatory in Sonoma County, and on Haleakala in Maui, Hawaii. Last year, a third site went online in Sonora, Arizona; now, a new station is being installed in Puerto Rico. Join communications specialist Beth Johnson, Simon Steel (Deputy Director, Carl Sagan Center) and Outreach Manager for LaserSETI Lauren Sgro to talk about the London exhibition, the new observatories, and what this all means in the search for life beyond Earth. (Recorded live 26 June 2025.)

🌍 What Will Earth Look Like in 1000 Years? Will humanity collapse, thrive, or colonize the stars—and could alien civilizations detect us? Join senior planetary astronomer Dr. Franck Marchis for a fascinating conversation with Dr. Jacob Haqq-Misra, astrobiologist and lead author of a groundbreaking study exploring 10 possible futures for Earth's technosphere—the global network of our technologies—and what these futures mean for the search for extraterrestrial intelligence (SETI). 🚀 From stable zero-growth societies to interstellar expansion, Dr. Haqq-Misra's team models how Earth's trajectory might look over the next millennium and what clues we might be sending into space. Could future Earth resemble a sci-fi utopia—or become invisible to alien observers? 👽 Learn how technosignatures like atmospheric pollution (yes, even nitrogen dioxide!) could help us find—or hide from—civilizations across the galaxy. 🔭 Whether you're into space exploration, science fiction, or the future of humanity, this interview dives deep into the cosmic implications of our technological choices. (Recorded live 12 June 2025.)

Join planetary scientist Beth Johnson as we explore a groundbreaking discovery from NASA's Curiosity rover on Mars. Scientists have identified siderite—a rare iron carbonate mineral—within ancient Martian rocks, offering new insights into Mars' once-thicker atmosphere and its now-lost carbon cycle. This discovery reshapes our understanding of the Red Planet's climate history and helps us draw powerful parallels to Earth's carbon processes. Dr. Ben Tutolo, associate professor at the University of Calgary and participating scientist on NASA's Curiosity rover team, explains that as Mars' atmosphere thinned over time, carbon dioxide was sequestered into rock formations, leading to a dramatic climate shift from a warm, wet environment to the cold, arid planet we see today. These findings provide evidence that ancient Mars was habitable and offer insights into the fragility of planetary climates. Dr. Tutolo emphasizes the parallels between Mars' atmospheric changes and current efforts on Earth to mitigate climate change by converting anthropogenic CO₂ into stable carbonates. Understanding the mechanisms of carbon sequestration on Mars could inform strategies to address climate challenges on our own planet. (Recorded live 5 June 2025.)

Why are Titan's river deltas missing? Planetary astronomer Franck Marchis taps in for Beth Johnson to chat with Brown University's Sam Birch and explore a strange and unexpected mystery on Saturn's largest moon. Using data from NASA's Cassini mission and advanced computer modeling, Birch's team reveals that Titan's shorelines defy Earth-like expectations. Despite Titan's known rivers and seas of liquid methane, the team found a surprising absence of deltas—landforms typically formed when rivers deposit sediment at their mouths. This finding challenges existing geological expectations, as deltas are common on Earth where rivers meet larger bodies of water, and suggests that Titan's geological and climatic processes differ significantly. This discovery opens new avenues for research into Titan's sediment transport mechanisms and its potential to preserve signs of past environmental conditions or even life. (Recorded live 29 May 2025.)

What if the origin of life isn't a one-in-a-billion cosmic fluke, but something that happens whenever the conditions are just right? Join communications specialist Beth Johnson as we explore groundbreaking research from the University of Wisconsin–Madison, where scientists have identified over 270 self-replicating chemical reactions that may have sparked life, not just on Earth, but potentially anywhere in the universe. Led by astrobiologist Dr. Betül Kaçar, this study reframes our understanding of how life can emerge from simple chemistry. Discover how these "chemical recipes" might reveal a universal pattern for life, help us search distant planets more effectively, and bring us one step closer to answering one of humanity's biggest questions: Are we alone? (Recorded live 15 May 2025.)

A groundbreaking study from the University of Colorado Boulder suggests that ancient Mars was far from the cold, arid planet we know today. Led by Amanda Steckel, the research team utilized computer simulations to reveal that billions of years ago, Mars experienced significant precipitation—either rain or snow—that carved out extensive networks of valleys and channels across its surface. These findings challenge previous theories that Mars was predominantly cold and dry, instead supporting the idea of a warmer, wetter climate during the Noachian epoch, approximately 4.1 to 3.7 billion years ago. The study provides compelling evidence that precipitation played a crucial role in shaping the Martian landscape, offering new insights into the planet's climatic history and its potential to have supported life. Join planetary scientist Beth Johnson and Dr. Steckel as they discuss the results of this study and its implications for finding life, especially past life, on Mars. (Recorded live 8 May 2025.)

One significant threat to life here on Earth is the possibility that a massive asteroid will collide with our planet and destroy life as we know it. To understand the possibilities, large surveys of the sky have found around 95% of potentially hazardous asteroids larger than a kilometer. Smaller asteroids, however, can also cause massive amounts of damage. Estimates range from 40 to 60 percent when it comes to asteroids over 100 meters in diameter, which would be considered city-killers. Even smaller asteroids, such as the 20-meter one that exploded over Chelyabinsk in 2013, can cause destruction and injury. The more asteroids we can find, the better our predictions and future protections will be. In light of this threat, scientists have used the JWST to detect 138 of the smallest asteroids (as small as 10 meters) ever observed in the asteroid belt. These tiny asteroids are important because they can become near-Earth objects (NEOs), posing a risk to Earth through possible impacts, including powerful explosions. By analyzing the size and frequency of asteroids, researchers found a significant change in the population of asteroids around 100 meters in size, likely due to collisions breaking larger asteroids into smaller ones. The observed asteroids originated from known asteroid families and were detected using advanced tracking and infrared imaging techniques. This research enhances our understanding of asteroid behavior and may aid in predicting and mitigating future asteroid threats. Join planetary astronomer Franck Marchis in a conversation with lead authors Artem Y. Burdanov and Julien de Wit as they discuss these smaller asteroids and what they can reveal about potential threats to our planet. (Recorded live 1 May 2025.)

​A recent study proposes a new model for the evolution of intelligent life, which challenges the long-standing "hard steps" theory that the emergence of intelligent life is an exceedingly rare event due to a series of improbable evolutionary milestones. A team led by postdoctoral researcher Dan Mills from the University of Munich suggests that the development of intelligent life is a natural outcome of planetary evolution. They argue that Earth's environment underwent sequential "windows of habitability," periods when conditions became favorable for complex life to emerge. (Past Drake Award winner Jason Wright is a co-author on the study.) The study emphasizes the importance of interdisciplinary collaboration between astrophysics and geobiology to understand the evolution of life. Join planetary astronomer Franck Marchis in an in-depth discussion with Dr. Mills about why intelligent life may be common and how this could affect our search for life beyond Earth. (Recorded live 24 April 2025.)

Join Dr. Franck Marchis, Chief Science Officer and co-founder at Unistellar and director of Citizen Science at SETI Institute, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We will give an update on T CrB, share our new Satellites mode, discuss an exoplanet candidate campaign to confirm a planet, and look ahead to an occultation of asteroid 319 Leona. We will also answer your questions about our program from the Unistellar community page and discuss recent highlights. (Recorded live 17 April 2025.)

A road trip to a gypsum quarry in Algeria led Youcef Sellam on a journey of scientific discovery. From the road trip to an internship in Italy, he and his colleagues later discovered microbial fossils—marking a first for Algerian gypsum. As a Ph.D. student at the University of Bern, Sellam and his team took this research further. They used a special instrument to detect the chemical signatures of these ancient microbes, demonstrating a method that could one day help search for traces of life on Mars. Their findings, published in Frontiers in Astronomy and Space Sciences, highlight how chemical analysis can reveal biological traces in minerals. Join planetary scientist Beth Johnson and Youcef for a discussion of how this research brings us one step closer to understanding how we might detect past life on the Red Planet. (Recorded live 10 April 2025.)

In a recent study, Dr. Janice Bishop of the SETI Institute, along with postdoctoral researcher Adomas Valantinas from Brown University, propose that Mars' characteristic red hue is primarily due to ferrihydrite—a water-rich iron oxide mineral—rather than the previously assumed hematite. Analyses of data collected by Martian orbiters, rovers, and laboratory experiments showed that ferrihydrite closely matches the composition of the dust covering Mars' surface. Ferrihydrite typically forms in environments abundant in cool water, suggesting Mars once had significant liquid water on its surface. The research implies that Mars transitioned from a wet to a dry environment billions of years ago. Confirming these findings would require returning samples from Mars to Earth for comprehensive analysis. Join planetary scientist Beth Johnson for a chat with Dr. Bishop about the evidence for ferrihydrite and what it could have meant for life on Mars. (Recorded live 3 April 2025.)

In The Climate Chronicles, a podcast with 42 episodes across eight seasons, Professor Dagomar Degroot of Georgetown University "takes you on a journey through 50 million years of climate change." He delves into how climate change has shaped civilizations—from the earliest hominid ancestors to the present era of rapid global warming. Through storytelling and historical analysis, he reveals the profound influence of climate on human societies. He explains how lessons from the past can help us navigate the challenges of today and tomorrow. Join communications specialist Beth Johnson for a conversation with Professor Degroot. They will explore the intricate connections between climate, human history, and future challenges. (Recorded live 27 March 2025.)

With over 7,000 exoplanets identified in our galaxy, scientists are shifting their focus to studying these worlds' characteristics in the quest for extraterrestrial life. The backdrop for one team is the discovery of super-Earth HD 20794 d, an exoplanet detected by researchers from the University of Geneva (UNIGE) and NCCR PlanetS. Orbiting in an eccentric path, HD 20794 d moves in and out of its star's habitable zone, making it a compelling subject for further study. This breakthrough, built on two decades of observations with the world's most advanced telescopes, has just been published in Astronomy & Astrophysics. Join planetary astronomer Franck Marchis and lead author Nicola Nari for a discussion on the search for exoplanets, what a habitable world could look like, and how HD 20794 d will help us understand our universe. (Recorded live 20 March 2025.)

The OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission has been a resounding success, from taking a sample of asteroid Bennu to returning that sample to Earth. The first in-depth analysis of the space rocks is complete, and the results have been published in Nature and Nature Astronomy. One of the most intriguing results shows that 14 of the 20 amino acids life on Earth uses to form proteins have been found in the sample. This result supports the hypothesis that objects that formed farther from the Sun provided precursor ingredients for life. Join communications specialist Beth Johnson and senior sample scientist Danny Glavin from NASA's Goddard Space Flight Center for a discussion of these important results and their implications for the development of life. (Recorded live on 13 March 2025.)

NASA's Polarimeter to Unify the Corona and Heliosphere, or PUNCH mission, is a constellation of four small satellites in low Earth orbit that will make global, 3D observations of the Sun's corona to better understand how the mass and energy there become the solar wind that fills the solar system. Imaging the Sun's corona and the solar wind together will help scientists better understand the entire inner heliosphere—the Sun, solar wind, and Earth—as a single connected system. Solar wind and energetic solar events like flares and coronal mass ejections can create space weather effects throughout the solar system. These phenomena can significantly impact human society and technology, sparking and intensifying auroras, interfering with satellites, and triggering power outages. The measurements from PUNCH will provide scientists with new information about how these potentially disruptive events form and evolve. This could lead to more accurate predictions about the arrival of space weather events at Earth and the impact on humanity's robotic explorers in space. The launch of PUNCH and the SPHEREx mission is scheduled for no earlier than 27 February 2025 from Vandenberg SFB. Simon Steel, Deputy Director of the Carl Sagan Center, and MUSE Outreach Lead Rebecca Robinson will attend the launch and return to the SETI Institute for a chat about the mission, its scientific goals, and its relevance to understanding life on Earth. (Recorded live 6 March 2025. PUNCH launched on 11 March.)

During his time as an Artist in Residence (AIR) at the SETI Institute, visual artist, psychiatrist, and psychoanalyst Martin Wilner invited prominent SETI Institute scientists to participate in his ongoing project, The Case Histories. Interested in exploring how scientists relate to the possibility of encountering an alien life form, Wilner invited researchers such as Jill Tarter, Seth Shostak, and Franck Marchis to send him daily messages and share thoughts of interest. These messages, filtered through the prism of psychoanalytical principles, were then transformed into drawings and visualized as daily elements of a calendar. More recently, Wilner has expanded his conversations into the realm of AI, an "alien" intelligence that is already in our midst. In this conversation, hosted by SETI AIR Director Bettina Forget, discover how Wilner weaves connections between the human mind, machine learning, consciousness, and our ideas about extraterrestrial life. (Recorded live 27 February 2025.)

Over the past decade, NASA's Lunar Reconnaissance Orbiter (LRO) has captured thousands of high-resolution images of the Moon's surface—far more than humans can manually review. To tackle this challenge, scientists have developed an automated system that quickly identifies scientifically significant images from the LRO data, making it the first anomaly detector for planetary imagery. Experiments show that the system reliably highlights unusual features, such as striking geological formations and sites of human landings or spacecraft crashes. This approach fills a critical gap in planetary science, offering a groundbreaking way to uncover hidden insights in vast archives of remote-sensing data. Join senior planetary astronomer Franck Marchis as he chats with authors Adam Lesnikowski and Daniel Angerhausen about this revolutionary method and its implications for future discoveries. (Recorded 20 February 2025.)

If an extraterrestrial civilization existed with technology similar to ours, would they be able to detect Earth and evidence of humanity? If so, what signals would they detect, and from how far away? Researchers used a theoretical, modeling-based method, and this study is the first to analyze multiple types of technosignatures together rather than separately. The findings revealed that radio signals, such as planetary radar emissions from the former Arecibo Observatory, are Earth's most detectable technosignatures, potentially visible from up to 12,000 light-years away. Join Simon Steel, Deputy Director of the Carl Sagan Center, for a chat with lead author Sofia Sheikh about the research's findings and their implications for the search for technosignatures. (Recorded 13 February 2025.)

Join Dr. Franck Marchis, Chief Science Officer and co-founder at Unistellar and director of Citizen Science at SETI Institute, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We review the 2024 citizen science accomplishments and discuss the 2025 campaigns so far. We will answer your questions about our program from the Unistellar community page and discuss some recent highlights. (Recorded 6 February 2025.)

New research using the Atacama Large Millimeter/submillimeter Array (ALMA) telescope reveals that planet formation can occur in harsh, high-radiation stellar environments. This contradicts earlier assumptions and suggests planet formation is more resilient than previously thought. The study observed protoplanetary disks within the Sigma Orionis cluster, finding structures indicating potential planet formation despite intense ultraviolet radiation from a nearby star. These findings expand our understanding of planetary formation and its prevalence throughout the galaxy, informing studies of our own solar system's origins. The high-resolution images obtained by ALMA were crucial to these discoveries. Join communications specialist Beth Johnson for an interview with lead author Dr. Jane Huang about this new research, its impact on understanding our solar system, and how it relates to the search for habitable worlds. (Recorded 23 January 2025.)

Happy New Year! 2024 brought us a lot of exciting space news, from a total solar eclipse to the launch of Europa Clipper and our celebration of 40 years as the SETI Institute. What does 2025 hold? Join hosts Beth Johnson and Franck Marchis for our first show of the year, taking a look at new ground and space telescopes, planned missions and milestones, as well as the various eclipses. Plus, Saturn's rings will be "disappearing"! (Recorded live 9 January 2025.)

Join communications specialist Beth Johnson and historian Rebecca Charbonneau as they discuss Dr. Charbonneau's new book, Mixed Signals. The book examines the Cold War relationship between the US and the USSR, what it meant for radio astronomy, and how it affected the Search for Extraterrestrial Intelligence. (Recorded live on 19 December 2024.)

Get ready to giggle and make bad jokes. Uranus is back in the news. In 1986, Voyager 2 flew by the distant ice giant and made a strange discovery—the planet's magnetic field was weird. It's not just weird; it's unlike every other planet in the solar system. For nearly 40 years, scientists have tried to understand why. To solve the mystery, researchers delved into the data collected by Voyager 2 and found a "cosmic coincidence". The solar wind was unusually strong just prior to the flyby, causing the strange observations. This is good news for Uranus's moons, which were thought to be inactive as a result of the Voyager 2 findings. Join planetary scientist Beth Johnson and space plasma physicist Jamie Jasinski from NASA's Jet Propulsion Laboratory as they discuss the initial observations, how the data was reevaluated, and what this all means for future missions to Uranus. (Recorded 12 December 2024.)

Imagine that scene from every apocalyptic asteroid movie—you know the one. The scientist comes rushing in because a "new" asteroid has been detected and is on a collision course with Earth. What happens next? The answer depends on several factors: how big is the asteroid, what is it made of, and how soon is the impact? (That's simplified but roll with it.) NASA's DART mission showed that an impactor can change the orbit of an asteroid, but that tested the hypothesis on the tiny moon of a small asteroid. What if the asteroid is much larger? Scientists at Sandia National Laboratories in New Mexico may have an answer -- a controlled nuclear blast that deflects (rather than destroys) the asteroid. Join planetary scientist Beth Johnson and lead author Nathan Moore for an exciting—and probably terrifying—conversation about how to keep our advanced civilization alive. (Recorded live 5 December 2024.)

Join Dr. Franck Marchis, Chief Science Officer and co-founder at Unistellar and director of Citizen Science at SETI Institute, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We take the time to answer your questions about our program on the Unistellar community page and discuss some of the recent highlights, including comet observations and exoplanet discoveries. (Recorded 21 November 2024.)

Nearly 40 years ago, on November 20, 1984, the SETI Institute was incorporated with inaugural officers CEO Thomas Pierson and SETI scientist Jill Tarter. The goal was to provide SETI researchers with a place to grow the search for life beyond Earth. What began with one NASA-funded SETI project and two people has since grown to include over 100 researchers and various scientific areas of study, all seeking to understand the origins and prevalence of life and intelligence in the universe. As a part of our outreach and education efforts, we grew our presence on the Internet, reaching out to a wide audience through our website, social media, and livestreams like SETI Live. We have education programs across all age ranges. We produce the weekly podcast Big Picture Science. And today, we celebrate all of these accomplishments and look forward to the next 40 years of science. Join host and senior planetary astronomer Franck Marchis as he chats with SETI Institute President and CEO Bill Diamond, senior astronomer and Big Picture Science co-host Seth Shostak, long-time Board of Directors member Andrew Fraknoi, and the Director of the Carl Sagan Center Nathalie Cabrol. (Recorded live 14 November 2024.)

OSIRIS-REx and the Hayabusa spacecraft have sample asteroids to understand what they're made of. NASA sent the DART mission to change the orbit of a tiny asteroid orbiting another asteroid. ESA sent Hera as a follow-up mission to see what the impactor did. All of these missions have been done in the name of planetary defense -- protecting Earth from the worst of the rocks in space. While none of the asteroids so far discovered are a threat to our planet in the next century, there are still more out there that are small enough to do major damage to a city or even country. So what do we do if we find a near-Earth asteroid that's a real threat? Launch a team a la "Armageddon"? Ignore the problem? Try to flee off-planet or below ground? As DART showed, the best answer seems to be "move it out of the way". In his new book "How to Kill an Asteroid", Dr. Robin George Andrews tells the story of planetary defense and how we got to this point in saving ourselves. Join communications specialist Beth Johnson in a fun (and slightly scary) conversation with Dr. Andrews about killer asteroids this Halloween on SETI Live. (Recorded 31 October 2024.)

In September 2022, a small spacecraft called DART hit the surface of a tiny asteroid moonlet called Dimorphos. That spacecraft was the first test of a planetary defense system, attempting to change an asteroid's orbit in the hope of being able to do so under a real near-Earth threat. The test succeeded, shortening the moonlet's orbit by 32 minutes. Now, a follow-up mission called Hera is on its way to the system, complete with an orbiter and a lander. The European Space Agency plans to observe the impact site and measure any changes to the shape and any craters left behind. Join communications specialist Beth Johnson as she chats with Hera's principal investigator, Patrick Michel, from the Université Côte d'Azur about the mission, the science, and the technology being tested. (Recorded live 24 October 2024.)

The cosmos is full of huge questions: "What caused the Big Bang? What happens inside black holes? Are there other dimensions?" Scientists have been working to answer these questions, but sometimes, we feel like the answers are unknowable. Astrophysicist Kelsey Johnson contemplates what this paradox means for science, particularly where philosophy and even religion come into play. In her latest book, "Into the Unknown", Johnson takes us to the edge of our understanding. Join communications specialist Beth Johnson as she chats with author Kelsey Johnson about science, philosophy, and our quest for answers that may not be available. (Recorded live 21 October 2024.)

In 1976, NASA's two Viking spacecraft touched down on Mars, becoming the first successful landers on the red planet. On board Viking 1, the craft carried several biological experiments to search for life. While most scientists consider the results of those experiments to be negative for Martian life, one experiment gave a positive result. The resulting controversy has spanned decades, with numerous scientists weighing in. Now, Dirk Schulze-Makuch from the Centre of Astronomy and Astrophysics (ZAA) at Technische Universität Berlin questions how those experiments were performed in light of what we know of extremely dry environments here on Earth. These Mars analogs, such as the Atacama desert in Chile, show that while microbes can survive in harsh conditions, too much water becomes a problem. And those Viking experiments may have involved too much water. Join Dr. Franck Marchis as he discusses Dr. Schulze-Makuch's recent Nature Astronomy article and how we should follow the salts instead of the water. (Recorded 28 October 2024.)

Suppose global warming raised temperatures so drastically that crops failed and caused world hunger. Would you support the idea of gene editing humans' skin cells so that photosynthesis would become an alternative source of human nutrition? The Non Random Arts Collective, part of the SETI Institute's Artist in Residence (AIR) program, explores fascinating scenarios connecting climate change, habitability, and gene editing. SETI AIR Director Bettina Forget chats with the collective about their GAIA workshop series, which they led at the SETI Institute this summer, where they invited scientists and artists to engage with the intricacies of climate adaptation, space exploration, and genetic research. The Non Random Arts Collective consists of Linda O'Keeffe, Ashley James Brown, Tony Doyle, and Ines Montalvao. Together, they delve into the intersections between the arts and diverse fields such as astrophysics, genetics, urban planning, ecology, climate change, technological adaptation, AI, and design futures. (Recorded live 17 October 2024.)

Comets are small objects in our solar system made of ice and dust. As they get closer to the Sun in their orbits, the ices turn into gas and give off a glow that can be seen in telescopes. With luck, that glow brightens to the point where a comet can be seen with the unaided eye. Some, like Halley's Comet, return on a regular schedule. Others are more one and done, breaking apart as they near the Sun or getting a gravity assist to leave our solar system. And every year, astronomers hope for the "comet of the century" -- a rare but visible comet that provides a show with a glorious coma and tail. This October, the observing community hopes that not just one but TWO recently discovered comets will put on that show. This week, Beth Johnson is joined by Dr. Ariel Graykowski, the Cometary Activity Lead for the SETI Institute and Unistellar citizen science project, to chat about the search for comets and the hope that either Comet C/2023 A3 Tsuchinshan-ATLAS or C/2024 S1 (ATLAS) will soon be visible to the unaided eye. (Recorded 3 October 2024.)

Exoplanets are planets that orbit stars outside our solar system. We've been finding potential exoplanets more often since the Kepler and TESS spacecraft were launched. But confirming these planets takes time, and telescope time is limited. To speed up the process, amateur astronomers are using their own telescopes. One program, called UNITE (Unistellar Network Investigating TESS Exoplanets), brings together a global group of volunteer and professional astronomers. They use Unistellar telescopes to gather data when exoplanets pass in front of their stars, blocking some of the light. Scientists from the SETI Institute and Unistellar analyze this data. Recently, they confirmed two exoplanets—a hot Jupiter and a warm sub-Saturn. Dr. Lauren Sgro, UNITE's Exoplanets Lead, talks with communications specialist Beth Johnson about exoplanets, community science, and how science is evolving. (Recorded live 19 September 2024.)

In the quest to find life beyond Earth, icy worlds within our solar system are full of potential. Europa, one of Jupiter's four largest (Galilean) moons, is one possible target because of the vast ocean beneath its icy shell. That ocean, heated by the push and pull of Jupiter, could contain life. The Europa Clipper mission will send a spacecraft to the distant moon, and the spacecraft's instruments will determine if the conditions truly are suitable. This week, NASA announced that Europa Clipper passed another milestone toward the October 10 launch window. Communications specialist Beth Johnson is joined by Project Staff Scientist and Science Communications Lead Cynthia Phillips to discuss the mission and how it could answer the question, "Are we alone?" (Recorded live 12 September 2024.)

There are supermassive black holes. There are stellar mass black holes. And based on the idea that galaxies evolve as they merge, there should be black holes in between -- intermediate mass black holes. However, finding these middle-of-the-road beasts has been difficult. Now, a new paper in Nature identifies the first ever mid-size sedan in a universe of compact cars and SUVs. This black hole resides in the center of the Omega Centauri star cluster, which is thought to be the core of a galaxy that merged with the Milky Way billions of years ago. Deputy Director of the Carl Sagan Center Simon Steel chats with lead author Maximilian Häberle (Max Planck Institute for Astronomy) about just what this discovery means for astrophysics and galaxy evolution. (Recorded live 5 September 2024.)

When a star at its life's end explodes, a debris cloud expands away from the now-dead star. The debris forms intricate and amazing structures in the expanding cloud and can cause the formation of a variety of molecules. Using the James Webb Space Telescope, scientists have collected information regarding Cassiopeia A (Cas A), the youngest known supernova remnant in the Milky Way. The observations shed light on how molecules and dust form and are destroyed in the aftermath of an explosion. These results suggest that supernovae, like Cas A, are key sources of the dust observed in ancient galaxies. A recent paper highlights the findings of this work, including the temperatures measured and molecules formed. Deputy Director of the Carl Sagan Center Simon Steel chats with lead author Jeonghee Rho and co-authors Danny Milisavljevic and Ilse De Looze about the data collected and what it means for dust formation in the universe. (Recorded live 29 August 2024.)

Scientists now can work out what the atmospheres of worlds outside our solar system are made of. Using the James Webb Space Telescope, we have seen water, carbon dioxide, methane, and other gases. Could we, from this distance, know how those gases formed? Possibly. Looking for planets with signs of being intentionally changed - terraforming - would give us proof of an advanced civilization, and a new paper explores just how the investigation process would work. Senior astronomer Franck Marchis talks with authors Edward W. Schwieterman and Daniel Angerhausen about what these gases would be and why they would work as evidence of life. (Recorded 28 August 2024.)

A super-Earth in a distant star system may explain what Mars, Venus, and Earth were like billions of years ago -- incredibly hot and covered in magma oceans. Those oceans may have supplied the planets with early atmospheres full of gases needed for life. While Venus's atmosphere became thick and heavy and Mars couldn't hold on to its atmosphere, Earth became a truly habitable world where life thrives. What can 55 Cancri e, over 40 light years away, teach us about our early solar system? Planetary scientist Beth Johnson asks Renyu Hu (NASA JPL) about his recent paper that uses JWST to examine the distant world's atmosphere. (Recorded 22 August 2024.)

"The Secret Life of the Universe" by Dr. Nathalie Cabrol, the SETI Institute's chief scientist and Director of the Carl Sagan Center at the SETI Institute, is coming out this week, both in the US (August 13, 2024) and in the UK (August 15, 2024). Scriber/Simon & Schuster publishes both editions. Cabrol articulates an overview of where we stand today in our search for life in the universe, what's coming, and how looking out for life beyond Earth teaches us about our place on our planet. Nathalie joins communications specialist Beth Johnson during this week's SETI Live to celebrate this occasion and discuss her latest work. (Recorded live 15 August 2024.)