Since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate, or writer who provides a unique perspective on the quest for knowledge about our solar system and beyond. The full show archive is available for free.

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Two Years of Hope: Celebrating the Emirates Mars Mission

Join us as we celebrate the accomplishments of a truly inspiring space mission - the United Arab Emirates' Hope probe, which has spent two amazing years orbiting Mars!

Space Policy Edition: The Tricky Ethics of Space Settlement

Dr. Erika Nesvold, astrophysicist and author of the new book Off-Earth: Ethical Questions and Quandaries for Living in Outer Space explores the ethical challenges facing our species as it dips its toe into living beyond our home planet.

Celebrating NASA’s Artemis I mission to the Moon

Jeremy Graeber, the assistant launch director at Kennedy Space Center in Florida, joins Planetary Radio to recount his experience on the night of Artemis I’s historic launch.

Planetary Society All-Stars Review the Year in Space

For his last episode as host, Mat Kaplan welcomes many of his Planetary Society colleagues for a review of a spectacular year of space exploration.

Artemis 1 Orion capsule comes home, and the best of Planetary Radio

Host Mat Kaplan greets the Orion capsule that has just returned from the Moon, and then presents some of the best of Planetary Radio’s 20 years.

It’s Not Just NASA: Space Agency Leaders at the Artemis 1 Launch Attempt

Leaders of several major, international space agencies talked with host Mat Kaplan during the first attempt to launch the Artemis 1 Moon mission.

Countdown to Artemis, The Return to the Moon

Join Mat Kaplan and Planetary Society colleagues in Florida for the first attempt to launch the Space Launch System rocket on a mission to the Moon.

Space Policy Edition: Mike Gold on Crafting the Artemis Accords

Former NASA Associate Administrator Mike Gold shepherded the Artemis Accords, a set of bilateral agreements for collaboration in human space exploration. Casey Dreier spoke with him in Florida as we awaited the launch of Artemis 1.

Space Policy Edition: Lori Garver on Bringing Change to NASA

Former NASA deputy administrator Lori Garver returns for a deep conversation with Casey Dreier about her fight to turn the agency toward commercial partnerships and away from the expensive Constellation program.

A Hero of the New Space Age: Lori Garver and Escaping Gravity

Lori Garver went up against powerful forces inside and outside NASA to create the hugely successful commercial cargo and crew programs.

Planetary Radio at the Humans to Mars Summit

Mat Kaplan helped host the Humans to Mars Summit in Washington D.C., where much of the community that is working to get us to Mars gathered.

Space Policy Edition: How Russia's Invasion of Ukraine Has Changed Space, with Mariel Borowitz

International space policy and sustainability expert Mariel Borowitz explores with Casey Dreier how the war in Ukraine reaches beyond Earth in ways that are chilling and surprising.

The End of Astronauts?

Britain’s Astronomer Royal Martin Rees and science writer Don Goldsmith question the value of putting astronauts in harm’s way at great expense in their new book.

Apollo 13 astronaut Fred Haise

Fred Haise takes us on board the mission that almost didn’t make it home from the Moon and shares many other stories.

Return to the Moon: Spacesuits and preparing for splashdown in the Pacific

Building the next spacesuit for Moon walkers, and a shipboard update on how the Artemis 1 Orion capsule will be recovered from the Pacific Ocean.

A good year for space: Planetary Society all-stars review 2021

Seven Planetary Society experts and enthusiasts celebrate 2021’s many space science and exploration milestones.

Sally Ride: Revisiting our 2005 conversation

A first-ever encore of our wonderful conversation with the first American woman in space.

Mars Beckons: The 2021 Humans to Mars Summit

Highlights of the annual gathering of leaders and experts who are building toward humans walking on the Red Planet.

The Wonderful: A new documentary about the International Space Station

Director Clare Lewins and NASA astronaut Cady Coleman discuss the new documentary "The Wonderful: Stories from the Space Station."

Andy Chaikin on Apollo 15 and the lessons of Apollo

Space historian and author of A Man on the Moon Andy Chaikin returns as we celebrate Apollo 15’s 50th anniversary.

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