Planetary Radio: Space Exploration, Astronomy and Science

When Artemis II returned its crew safely to Earth, millions of people found themselves unexpectedly moved. The mission was a test flight, a proof-of-concept, and yet it felt like something far greater than the sum of its parts.
In this episode, Casey Dreier, chief of space policy at The Planetary Society, sits down with Rebecca Lowe, philosophy senior fellow at the Mercatus Center at George Mason University, to explore the deeper meaning of humanity's return to deep space. Drawing on philosophy of mind, aesthetics, and theories of value, they unpack why human presence in space feels fundamentally different from even the most sophisticated robotic mission, and why that difference matters.
Discover more at: https://www.planetary.org/planetary-radio/spe-philosophy-of-artemis-ii
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On April 12th, 1961, Yuri Gagarin became the first human in space. Sixty-five years later, we celebrated that milestone at Griffith Observatory in Los Angeles, CA.
We began on the lawn of Griffith Observatory, where host Sarah Al-Ahmed spoke with exhibitors about the tools, dreams, and technology that drive space exploration. Laura Tomlin, CEO of Space for Teachers, shares how microgravity research projects inspire the next generation. Robotics engineer Kalind Carpenter from NASA’s Jet Propulsion Laboratory (JPL) walks us through the machines he’s helping to build to explore the moon and beyond. Software engineer David Hernandez from Blue Origin describes the work happening at Club for the Future to get young people excited about space. Research scientist Robert Green from JPL talks about the invention of imaging spectroscopy and how it’s used to unlock the secrets of distant worlds. And aerospace engineer Andy Sadhwani, who flew to space aboard Virgin Galactic, reflects on seeing Earth from above and what the Artemis II astronauts experienced.
We then move inside for Yuri's Night's evening stage show, where the focus shifts to human experience and the overview effect. Cinematographer and polar explorer Jannicke Mikkelsen, Norway's first astronaut, shares her experience as part of the first crew to orbit over both Earth's north and south poles. Space philosopher Frank White, author of "The Overview Effect," leads a panel discussion with actress Nadine Nicole from The Expanse and commercial space explorer Christopher Huie about what happens to humans when we see Earth from space. Finally, NASA astronaut Ron Garan brings it all together with a powerful vision of our planet's fragility, our interconnectedness, and humanity's potential when we work together.
The episode closes with Bruce Betts' What's Up segment, revealing a little-known story about what went wrong during Yuri Gagarin's historic first flight.
Discover more at: https://www.planetary.org/planetary-radio/2026-yuris-night-2026
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“Project Hail Mary” is finally in theaters, and the science is just as thrilling as the story. This week on Planetary Radio, Sarah Al-Ahmed and senior communications adviser Mat Kaplan share their first reactions fresh from the theater. Author and producer Andy Weir tells us in his own words what the story is really about, in a flashback conversation with Mat. Award-winning Nature correspondent Alexandra Witze takes a critical scientific eye to the film. Virginia Tech astrophysicist Nahum Arav walks us through the real-life fate of our Sun. And in What's Up, Bruce Betts joins us to explore just how long it would actually take humanity to reach Tau Ceti at the fastest speed a spacecraft has ever traveled.

Discover more at: https://www.planetary.org/planetary-radio/2026-project-hail-mary-hits-the-big-screen
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He built a rocket-powered bike when he was a kid. Now he leads the company that has made New Zealand number three among nations that launch big rockets, following the United States and China. Sir Peter Beck joins us for a deeply revealing and entertaining conversation about “The Launch of Rocket Lab,” the beautiful book that tells his and Rocket Lab's inspiring story. His dedication to advancing planetary science missions will make members of The Planetary Society proud!

Discover more at: https://www.planetary.org/planetary-radio/book-club-peter-beck
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The Artemis II crew has returned home safely after a historic 10-day journey around the Moon, the first crewed lunar mission in over 50 years. In this episode, we celebrate some of the mission's most extraordinary moments: the record-breaking Flight Day 6 when Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialists Christina Koch and Jeremy Hansen traveled farther from Earth than any humans in history, a breathtaking solar eclipse observed from lunar orbit, meteorite impact flashes spotted on the lunar surface, and a deeply personal crater dedication that moved the world.
But the triumph comes with turbulence. Just days after launch, the White House released a Presidential Budget Request proposing a 47% cut to NASA's science budget — threatening 84 missions and nearly half of NASA's science portfolio. Jack Kiraly, director of government relations at The Planetary Society, and Ari Koeppel, AAAS Science and Technology Policy Fellow, join host Sarah Al-Ahmed to break down what's at stake and what's being done about it. Plus, Chief Scientist Bruce Betts joins for this week's What's Up.
Discover more at: https://www.planetary.org/planetary-radio/2026-artemis-ii-save-nasa-science
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