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Planetary Radio: Space Exploration, Astronomy and Science

The Planetary Society

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 inside the

science

All Episodes

63:00

Book Club Edition: The Martians: The True Story of an...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/11/21

There was a time when almost everyone, from Alexander Graham Bell to the Wall Street Journal, believed there was a supremely intelligent civilization on Mars, one that was probably trying to talk to Earthlings. Most of this belief could be traced to an amateur astronomer and charismatic speaker named Percival Lowell. David Baron tells this story in “The Martians: The True Story of an Alien Craze that Captured Turn-of-the-Century America,” the product of seven years of research into this

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59:51

Epic Spaceman: Making cosmic scale human

Planetary Radio: Space Exploration, Astronomy and... ·

2025/11/19

When his filmmaking career stalled during the pandemic, Toby Lockerbie turned to the one place that had never stopped inspiring him: the Universe. With no background in visual effects, he taught himself the tools needed to transform complex space science into cinematic stories using everyday objects and beautifully crafted visuals to make the Cosmos feel human. His channel, Epic Spaceman, now reaches millions and has earned multiple Webby Awards for its innovative approach to visualizing scale, awe,

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61:28

The Planetary Society goes to TwitchCon 2025

Planetary Radio: Space Exploration, Astronomy and... ·

2025/11/12

The Planetary Society heads to TwitchCon 2025 to explore how scientists and educators use livestreaming to share the excitement of discovery. We begin with Moohoodles, one of Twitch’s pioneering space science streamers and co-host of the live panel “The Planetary Society: Space, Time, and You.” She explains how she built a thriving community around astrobiology and space exploration long before Twitch even had a Science & Technology category. Then we share moments from the

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81:45

Space Policy Edition: Should a (potential)...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/11/07

In 1996, a controversial claim of fossilized life in a Martian meteorite ignited a golden age of Mars exploration. Nearly 30 years later, a potential biosignature detected by the Perseverance rover at Jezero Crater has sparked…nothing, not even a formal effort to revive the beleaguered robotic Mars Sample Return project. Why did the claims surrounding the Allan Hills meteorite (which were ultimately rejected) kick off 25 years of unprecedented robotic exploration of the Red Planet? And why

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59:44

Do Aliens Speak Physics?

Planetary Radio: Space Exploration, Astronomy and... ·

2025/11/05

If we ever meet intelligent extraterrestrials, will we even be able to talk about physics? Physicist Daniel Whiteson of UC Irvine and cartoonist Andy Warner join Sarah Al-Ahmed to explore one of science’s strangest and most profound questions: if alien civilizations exist, would their understanding of the Universe look anything like ours? Their new book, “Do Aliens Speak Physics?”, discusses the nature of knowledge itself, asking whether math and physics are truly universal, or if

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69:09

Ripples on the Cosmic Ocean

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/29

What happens in space doesn’t stay in space. Historian Dagomar Degroot joins Planetary Radio host Sarah Al-Ahmed to explore how shifting solar cycles, volcanic eruptions on Venus, Martian dust storms, and even mistaken sightings of lunar forests have influenced life, science, and society on Earth. His new book, “Ripples on the Cosmic Ocean: An Environmental History of Our Place in the Solar System,” reframes the Solar System as part of our cosmic environment, one that has shaped

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61:51

2025 NASA’s Innovative Advanced Concepts Symposium:...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/22

In this second installment of Planetary Radio’s coverage from the 2025 NASA Innovative Advanced Concepts Symposium in Philadelphia, Pennsylvania, host Sarah Al-Ahmed highlights more of the technologies presented by the NIAC fellows. Mary Knapp of MIT Haystack Observatory shares her team’s Great Observatory for Long Wavelengths project, a space-based radio array designed to detect magnetic fields around distant exoplanets. Michael Hecht, also from MIT Haystack Observatory and principal

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55:18

Book Club Edition: Space Craze by Margaret Weitekamp

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/17

The American fascination with spaceflight and what we might find out there began long before any human left Earth. It’s Dr. Margaret Weitekamp’s job to collect, document, and preserve the cultural artifacts that display our deep attraction to all things spacey. Her book, Space Craze, explores how these objects, ranging from 1930s Flash Gordon ray guns to Mercury space capsule cookie jars, have represented our Earthbound fears and hopes. She joined the Society’s space-crazed Mat

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53:37

2025 NASA’s Innovative Advanced Concepts Symposium:...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/15

Each year, NASA’s Innovative Advanced Concepts program (NIAC) funds visionary ideas that could shape the future of space exploration. In this first of two episodes from the 2025 NIAC Symposium in Philadelphia, Pennsylvania, USA, Planetary Radio host Sarah Al-Ahmed introduces some of the concepts presented at this year’s event. You’ll hear from Martin Bermudez and Josh Simpson from Skyeports LLC. Bermudez is the company’s CEO and principal investigator for the LUNGS Project,

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60:17

A Day of Action to save NASA science

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/08

On October 6, 2025, hundreds of space advocates from across the United States joined The Planetary Society and 20 partner organizations on Capitol Hill to deliver one clear message: protect NASA’s science budget. We begin with Ari Koeppel, AAAS Science & Technology Policy Fellow and Space Policy Intern at The Planetary Society, who shares why this moment matters for scientists facing uncertainty about their future. Then Britney Schmidt, planetary scientist at Cornell University and member

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48:53

Space Policy Edition: China’s growing space science...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/03

If the United States is indeed in a space race with China, then we cannot abandon space science. That’s the claim made by Maxwell Zhu and The Planetary Society’s chief of space policy, Casey Dreier, in a recent op-ed in Payload Space. Their piece contrasted the growing ambitions of China’s coming space science program against the draconian cuts proposed by the White House in 2026. The results are stark: where China is pursuing new missions, the United States is abandoning them

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60:22

Perseverance finds potential biosignatures in Jezero...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/10/01

NASA’s Perseverance rover has made one of its most intriguing discoveries yet in Jezero Crater. A rock sample called Sapphire Canyon, drilled from the Bright Angel formation, contains unusual chemical and mineral patterns that may be potential biosignatures. We begin with remarks from Morgan Cable, research scientist at NASA’s Jet Propulsion Laboratory and co–deputy principal investigator of the PIXL instrument on Perseverance, in a video released alongside NASA’s September

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56:18

Bill Nye: A star in Hollywood, a voice for NASA

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/24

Bill Nye, CEO of The Planetary Society, has officially joined the Hollywood Walk of Fame. In this episode, we speak with Bill about what this rare honor means to him and to science communication. Then, we take you inside the star ceremony in Los Angeles, where friends and fans, including Boston Celtics star Jaylen Brown, paid tribute to his legacy. From there, we shift to Washington, D.C., where NASA faces the threat of deep budget cuts. Planetary Society Chief of Space Policy Casey Dreier and

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50:29

Book Club Edition: Cosmos Award–winning author Dava...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/19

Only six people have received The Planetary Society’s Cosmos Award for Outstanding Public Presentation of Science. We were honored to present it to author and historian Dava Sobel in May of 2025. She has created a brilliant library of books that illuminate the lives and work of great scientists, many of whom have been under-appreciated. Each of Dava’s works is also overflowing with the wonder of science and discovery. It’s no wonder we decided to feature Dava and her books in the

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67:36

A cosmic travel guide: 111 Places in Space That You...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/17

Pack your cosmic suitcase. This week on Planetary Radio, host Sarah Al-Ahmed is joined by Mark McCaughrean, astronomer, science communicator, and former Senior Advisor for Science & Exploration at the European Space Agency, to talk about his new book, “111 Places in Space That You Must Not Miss.” Part of the popular “111 Places” travel series, the book transforms the guidebook format into a tour across the Solar System and beyond, from Apollo landing sites on the Moon to

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59:51

International Observe the Moon Night 2025

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/10

This week on Planetary Radio, we look forward to International Observe the Moon Night on October 4, 2025. Host Sarah Al-Ahmed speaks with Staci Horvath, outreach coordinator for NASA’s Solar System Exploration Division at Goddard Space Flight Center and director of International Observe the Moon Night, and Theresa Summer, astronomy educator at the Astronomical Society of the Pacific, about the history of the event, how it connects people around the world, and the many ways you can participate

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60:33

Space Policy Edition: Does the rise of Elon mean the...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/05

NASA, the crown jewel of 20th-century technocratic liberalism, was the first to land humans on the Moon but now depends on SpaceX for its access to space. Atlantic writer Franklin Foer believes this reflects a diminishment of national capability and that NASA was inadvertently responsible for its own decline. He traces this transformation from a collective pursuit of higher values to a more individualistic — and idiosyncratic — motivation based on utility and extraction, and ties it to a

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56:18

Uranus revealed: Solving the ice giant’s heat mystery

Planetary Radio: Space Exploration, Astronomy and... ·

2025/09/03

For decades, Uranus has puzzled scientists. Unlike the other giant planets, Voyager 2’s 1986 flyby suggested the ice giant emitted no excess heat. Now, thanks to new analyses of Voyager data, decades of ground-based and space-based observations, and refined models, scientists have confirmed that Uranus does radiate more heat than it receives from the Sun. Host Sarah Al-Ahmed speaks with atmospheric scientist Michael Roman (Assistant Professor at the Universidad Adolfo Ibáñez in

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57:18

Esports and space: BASILISK’s quest for “Science...

Planetary Radio: Space Exploration, Astronomy and... ·

2025/08/27

BASILISK, the first esports organization dedicated to promoting science, has teamed up with The Planetary Society and Caltech’s Institute for Quantum Information and Matter to bring the banner of “Science Victory” to gamers around the world. Their roster includes world champions in StarCraft II, chess, Magic: The Gathering, and fighting games, all united by a shared mission to inspire the next generation of scientists. Joining us to talk about this unique collaboration is Kyle

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59:45

Silicate clouds and a dusty ring: JWST looks at YSES-1

Planetary Radio: Space Exploration, Astronomy and... ·

2025/08/20

In 2020, the YSES-1 system became the first directly imaged multiplanetary system around a Sun-like star. It features two giant exoplanets orbiting a star just 16 million years old. Now, the James Webb Space Telescope is revealing new insights into these distant worlds. Host Sarah Al-Ahmed speaks with Kielan Hoch, Giacconi Fellow at the Space Telescope Science Institute and principal investigator of the JWST program that captured these observations, and Emily Rickman, ESA science operations

en-US

1,298 results

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