Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you in ...
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The human stories behind the science: Dava Sobel receives the Cosmos Award
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1:02:54Few writers have captured the wonder of science through storytelling as powerfully as Dava Sobel. In this episode, we celebrate her remarkable career and her recent honor as the recipient of The Planetary Society’s 2025 Cosmos Award for Outstanding Public Presentation of Science. Mat Kaplan, senior communications advisor at The Planetary Society, s…
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Making space matter: A space journalist’s journey
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56:20What does it take to turn a love of space into a global career in science journalism? Sarah Cruddas has done just that. With a background in astrophysics and a passion for storytelling, she’s become a leading voice in space media, covering rocket launches, interviewing astronauts, and writing books that bring the Cosmos down to Earth. In this episo…
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Space Policy Edition: What does NASA need with an economist?
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1:14:51Former NASA Chief Economist Akhil Rao explains why NASA needs economic expertise to navigate the complex—and often misunderstood—market forces that will determine the success or failure of its private partnerships. As NASA relies ever more on commercial companies to enable its own exploration efforts, it is imperative, Rao believes, to provide clea…
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The dark age of NASA science? Analyzing the FY 2026 budget proposal
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59:17The White House has released its Fiscal Year 2026 congressional budget justification for NASA, and the implications are staggering. If enacted, this proposal would slash NASA’s science program funding by nearly half, cancel dozens of active and upcoming missions, and reduce the agency’s workforce by one-third. Sarah Al-Ahmed is joined by Jack Kiral…
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Volcanic worlds across the Solar System
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56:39Volcanoes aren’t just an earthly phenomenon. They’re found all across the Solar System. In this compilation episode of Planetary Radio, we explore volcanic and geothermal activity on planets, moons, and distant dwarf planets. You’ll hear from Rosaly Lopes, Nick Schneider, Rae Paoletta, Robbie Herrick, Scott Hensley, and Christopher Glein as they sh…
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Space science under fire: Your questions answered
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59:08As debates over NASA's future heat up, questions about the value of space exploration are popping up everywhere. This week on Planetary Radio, we're tackling the tough questions head-on with The Planetary Society's staff, including Casey Dreier, chief of space policy, and Ambre Trujillo, digital community manager. They break down the biggest miscon…
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Kosmos 482: The Soviet-era Venus probe that fell to Earth
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52:29This week on Planetary Radio, we explore the decades-long journey of Kosmos 482, a Soviet-era Venus probe that spent 53 years orbiting Earth before its dramatic return on May 10, 2025. Ben Fernando, a postdoctoral researcher in seismology and planetary science at Johns Hopkins University, joins us to explain the history of Kosmos 482 and how seismo…
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TOI-270 d: Unveiling the secrets of a sub-Neptune
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59:30TOI-270 d is revealing secrets about the most common type of planet in our galaxy, sub-Neptunes. Sarah Al-Ahmed is joined by planetary geochemist Chris Glein from the Southwest Research Insitute to discuss his team’s new analysis of its atmosphere, using data from JWST and insights from Earth analogs. Then, The Planetary Society’s Director of Gover…
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Space Policy Edition: How NASA remembers—and forgets
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1:18:43No one person knows how to build a spaceship. Dr. Janet Vertesi has seen this firsthand. She’s spent years embedded in NASA science teams, not as a participant, but as an observer. She’s a sociologist who studies the team dynamics of NASA missions. She is alarmed at the prospect of indiscriminate firings at the agency, and at the potential loss of …
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From backyard telescopes to global reach: AstroKobi and the power of short-form space videos
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59:28How does someone go from stargazing in a rural Australian backyard to inspiring millions around the world about space science? This week, Sarah Al-Ahmed sits down with Kobi Brown, better known as AstroKobi, to explore how his passion for the Cosmos and a knack for short-form storytelling launched his science communication career. They discuss the e…
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Celebrating 45 years of The Planetary Society at the Cosmic Shores Gala
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59:56Join us aboard the historic RMS Queen Mary for a celebration of The Planetary Society’s 45th anniversary. In this special episode of Planetary Radio, we bring you highlights from our Cosmic Shores Gala, where members, scientists, space advocates, and special guests came together to honor the past and look boldly to the future. You’ll hear from CEO …
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Passback budget breakdown: A 47% cut to NASA science
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59:51NASA’s science programs are facing the largest proposed budget cut in more than 40 years. This staggering 47%reduction could cancel missions, waste billions in U.S. taxpayer investments, and unravel decades of discovery. In this episode of Planetary Radio, host Sarah Al-Ahmed is joined by Casey Dreier, The Planetary Society’s Chief of Space Policy,…
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Why is Mars red? A new clue to the history of habitability in Martian dust
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54:56For decades, scientists hypothesized that Mars’ reddish color came from hematite, an iron oxide thought to have formed through dry oxidation after Mars lost its water. But new research suggests the story is more complex—and more watery—than we once imagined. In this episode, planetary scientist Adomas (Adam) Valantinas from Brown University joins h…
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Space Policy Edition: Lies, Damned Lies, and Space Data
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1:09:34The space sector is data-rich but insight-poor. Jack Kuhr, head of research at Payload Space, joins the show to unpack how business, budgeting, and performance data—not spacecraft science—can shape investments, drive growth, and influence policy. Is there a data crisis in the space industry? What gets measured, what gets missed, and how does that s…
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Live from Washington, D.C.: The future of space politics
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1:13:53Join Sarah Al-Ahmed and Casey Dreier for a special live recording of Planetary Radio at the Johns Hopkins University Bloomberg Center in Washington, D.C., immediately following The Planetary Society’s Day of Action. In this episode, we explore the complex geopolitical landscape NASA faces as it works toward returning humans to the Moon and explorin…
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The Other Moonshot: The untold stories of Apollo’s Black engineers in Los Angeles
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58:55The Apollo program put humans on the Moon, but behind that historic achievement were engineers whose stories have gone largely untold. In this episode, “LA Made: The Other Moonshot” host Joanne Higgins joins Planetary Radio to share the powerful history of Charlie Cheatham, Nate LeVert, and Shelby Jacobs, three Black engineers in Los Angeles who he…
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We take you inside the Mars Innovation Workshop, hosted at the SETI Institute’s headquarters and produced by Explore Mars. Planetary Society Senior Communications Advisor Mat Kaplan shares highlights from the event, exploring how cross-disciplinary collaboration is shaping the future of Mars exploration and creating solutions for challenges here on…
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An extinction-level event for NASA science
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1:07:29NASA's science missions have transformed our understanding of the Universe, from breathtaking images of deep space to robotic explorers on Mars. But now, a reported 50% cut to NASA's science budget threatens to shut down missions, halt discoveries, and devastate the future of space exploration. This week, Casey Dreier and Jack Kiraly from The Plane…
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Space Policy Edition: Locke, liberty, and the pursuit of happiness (in space)
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1:17:34Philosopher Rebecca Lowe joins us to explore how the ideas of classical liberalism can provide fresh insight into humanity’s activities in space. Our conversation explores the philosophical tensions between individual freedom and societal good, the instrumental and intrinsic value of space activities, and the uniquely accessible nature of space sci…
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Breaking down Bennu: OSIRIS-REx finds life’s building blocks in asteroid sample
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58:41NASA’s OSIRIS-REx mission has returned pristine samples from asteroid Bennu to Earth, and the early results are remarkable. Sample analysts have confirmed the presence of abundant organic compounds, nitrogen-rich material, and evidence of past liquid water, all key ingredients that could help us understand the role asteroids played in delivering th…
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Genesis: The sample return mission that fell to Earth and still succeeded
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1:01:13Twenty years ago, NASA’s Genesis spacecraft returned to Earth carrying precious samples of the solar wind, only to crash-land in the Utah desert. But that wasn’t the end of the mission. Amy Jurewicz, Assistant Research Professor Emeritus at Arizona State University and former project scientist at NASA’s Jet Propulsion Laboratory for the Genesis tea…
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Astronaut Hayley shares her brave adventure
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59:24From IV drips to rocket ships, Hayley Arceneaux has been on a journey. She joins Planetary Radio to discuss her memoir “Wild Ride” and her newly released kid's book “Astronaut Hayley's Brave Adventure,” which tell the story of how her experiences with childhood cancer at St. Jude Children's Research Hospital set the stage for her journey to space a…
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Near-Earth Asteroid 2024 YR4 and NASA under a new administration
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1:02:13The internet is buzzing about Asteroid 2024 YR4, currently ranked as the highest-threat asteroid in our skies. But is it really cause for concern? Our Public Education Specialist, Kate Howells, breaks down the facts. Then, we shift from potential impacts to stunning space imagery as Finn Burridge from the Royal Observatory Greenwich shares how astr…
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Space Policy Edition: Mars Sample Return, but at what (fixed) price?
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1:20:22Rocket Lab CEO Peter Beck joins the show to unpack his company’s bold, $4-billion fixed-price plan to bring Martian samples home, why he believes commercial partnerships can unlock new frontiers in planetary science, and his “soft spot” for interplanetary exploration. Then, Richard French — former JPL engineer and now VP of Business & Strategy at R…
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Kiss-and-capture: The dance of Pluto and Charon
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59:55How did Pluto meet its largest moon, Charon? Many have speculated that Charon formed in an impact, but traditional models of planetary formation have struggled to explain many of the quirks of this system. This week, Adeene Denton, a research scientist at the University of Arizona, shares her team's new paper that suggests a "kiss-and-capture" may …
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