It started with a question from a listener. The answer comes from Dawn mission chief engineer and mission director Marc Rayman. Marc also tells us about his new job as chief engineer for mission operations and science at NASA’s Jet Propulsion Laboratory, and shares his love of space exploration with Mat. LightSail 2 is still going strong! Program manager Bruce Betts opens this week’s What’s Up segment with a mission status report. Learn more at https://www.planetary.org/planetary-radio/2021-mark-rayman-dawn-ceres

It started with a question from a listener. The answer comes from Dawn mission chief engineer and mission director Marc Rayman. Marc also tells us about his new job as chief engineer for mission operations and science at NASA&rsquo;s Jet Propulsion Laboratory, and shares his love of space exploration with Mat. LightSail 2 is still going strong! Program manager Bruce Betts opens this week&rsquo;s What&rsquo;s Up segment with a mission status report. Learn more at <a href="https://www.planetary.org/planetary-radio/2021-mark-rayman-dawn-ceres">https://www.planetary.org/planetary-radio/2021-mark-rayman-dawn-ceres</a>

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 DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

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 DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

Planetary Radio: Space Exploration, Astronomy and Science

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 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, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

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 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, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

The ion engine-powered Dawn spacecraft will orbit Ceres for many years. Could it have touched down on the surface of the dwarf planet?

Why didn’t Dawn land on dwarf planet Ceres?

Green Bank, West Virginia is home to the world's largest fully steerable radio telescope. It's also the only town in the U.S. where cell phones and Wi-Fi are banned, so the telescope can listen for faint signals from across the Universe undisturbed. This week, we bring you a special conversation recorded after The Planetary Society's virtual screening of Small Town Universe, the documentary that follows the people whose lives are shaped by that place. Mat Kaplan, Planetary Society senior communications advisor, talks with filmmaker Katie Dellamaggiore and physicist Ellie White about making the film, the beauty and stakes of life at Green Bank, and the ongoing fight to keep the observatory funded.

Before that, Kate Howells, public communications specialist, previews the total solar eclipse crossing parts of the Northern Hemisphere on August 12th, the first visible from Western Europe since 1999. And Bruce Betts, chief scientist, joins for What's Up, breaking down Hayabusa2's July 5th flyby of asteroid Torifune.

Discover more at: https://www.planetary.org/planetary-radio/2026-small-town-universe

Green Bank, West Virginia is home to the world's largest fully steerable radio telescope. It's also the only town in the U.S. where cell phones and Wi-Fi are banned, so the telescope can listen for faint signals from across the Universe undisturbed. This week, we bring you a special conversation recorded after The Planetary Society's virtual screening of Small Town Universe, the documentary that follows the people whose lives are shaped by that place. Mat Kaplan, Planetary Society senior communications advisor, talks with filmmaker Katie Dellamaggiore and physicist Ellie White about making the film, the beauty and stakes of life at Green Bank, and the ongoing fight to keep the observatory funded.
Before that, Kate Howells, public communications specialist, previews the total solar eclipse crossing parts of the Northern Hemisphere on August 12th, the first visible from Western Europe since 1999. And Bruce Betts, chief scientist, joins for What's Up, breaking down Hayabusa2's July 5th flyby of asteroid Torifune.
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-small-town-universe">https://www.planetary.org/planetary-radio/2026-small-town-universe</a>

Green Bank, West Virginia bans cell phones and Wi-Fi so its giant radio telescope can listen undisturbed. This week, Senior Communications Advisor Mat Kaplan talks with director Katie Dellamaggiore and physicist Ellie White about the documentary Small Town Universe, and Public Education Specialist Kate Howells previews August's total solar eclipse.

Small Town Universe: Inside Green Bank's Radio Quiet Zone

NASA's plan for what comes after the International Space Station (ISS) has been anything but stable. Since 2019, the agency's commercial space station strategy has shifted from free-flying vendor-operated stations to a government-owned module attached to the ISS, and back again, all while the clock ticks toward the ISS's expected retirement around 2030. 

Clayton Swope, deputy director of the Aerospace Security Project and senior fellow at the Center for Strategic and International Studies, joins Planetary Society Chief of Space Policy Casey Dreier to unpack this saga and weigh whether NASA can realistically select and fund a commercial successor to the ISS in time.

Discover more at: https://www.planetary.org/planetary-radio/commercial-space-stations

NASA's plan for what comes after the International Space Station (ISS) has been anything but stable. Since 2019, the agency's commercial space station strategy has shifted from free-flying vendor-operated stations to a government-owned module attached to the ISS, and back again, all while the clock ticks toward the ISS's expected retirement around 2030.&nbsp;
Clayton Swope, deputy director of the Aerospace Security Project and senior fellow at the Center for Strategic and International Studies, joins Planetary Society Chief of Space Policy Casey Dreier to unpack this saga and weigh whether NASA can realistically select and fund a commercial successor to the ISS in time.
Discover more at: <a href="https://www.planetary.org/planetary-radio/commercial-space-stations-after-iss">https://www.planetary.org/planetary-radio/commercial-space-stations</a>

Clayton Swope, deputy director of the Aerospace Security Project and senior fellow at CSIS, joins the show to break down NASA's rocky path toward a commercial replacement for the International Space Station. 

Space Policy Edition: What's going on with commercial space stations?

After more than two decades, the European Space Agency's Rosalind Franklin rover finally has a path to the launchpad. This week, ExoMars Project Scientist Jorge Vago joins Planetary Radio to talk about what makes this mission like nothing we've sent to Mars before: a drill capable of reaching 2 meters beneath the surface, where organic molecules may have been shielded from radiation for billions of years. We dig into how the rover will scout its drilling sites, how its onboard laboratory will analyze samples for signs of life, and why the chirality of any organic molecules it finds could be one of the most telling clues of all. 

Then stick around for What's Up with Bruce Betts, our chief scientist, where we talk about the ExoMars Trace Gas Orbiter, the spacecraft already at Mars that will serve as Rosalind Franklin's lifeline back to Earth.

Discover more at: https://www.planetary.org/planetary-radio/2026-rosalind-franklin

After more than two decades, the European Space Agency's Rosalind Franklin rover finally has a path to the launchpad. This week, ExoMars Project Scientist Jorge Vago joins Planetary Radio to talk about what makes this mission like nothing we've sent to Mars before: a drill capable of reaching 2 meters beneath the surface, where organic molecules may have been shielded from radiation for billions of years. We dig into how the rover will scout its drilling sites, how its onboard laboratory will analyze samples for signs of life, and why the chirality of any organic molecules it finds could be one of the most telling clues of all.&nbsp;
Then stick around for What's Up with Bruce Betts, our chief scientist, where we talk about the ExoMars Trace Gas Orbiter, the spacecraft already at Mars that will serve as Rosalind Franklin's lifeline back to Earth.
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-rosalind-franklin">https://www.planetary.org/planetary-radio/2026-rosalind-franklin</a>

The European Space Agency's Rosalind Franklin rover finally has a path to Mars. ExoMars Project Scientist Jorge Vago joins Planetary Radio to discuss the rover's 2-meter drill, its onboard astrobiology lab, and what it would mean to finally find evidence that Mars was once home to life.

Why didn’t Dawn land on dwarf planet Ceres?

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