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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Sally Ride: Revisiting our 2005 conversation

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

Amazing technology at the NASA Innovative Advanced Concepts symposium

Here’s our sampling of the leading edge research presented by NIAC Fellows at NASA’s 2021 virtual gathering.

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.

Amy Mainzer and a New Asteroid-Hunting Space Telescope

NASA has approved development of the NEO Surveyor space telescope. Project lead Amy Mainzer shares her hopes for this vital planetary defense tool.

Space Policy Edition: The Pentagon's UFO Report, Featuring Sarah Scoles

The Pentagon has released its assessment of Unidentified Aerial Phenomena. Casey Dreier and science journalist Sarah Scoles talk about what’s behind the renewed interest in UFOs and Sarah’s book, They Are Already Here.

Finding Life by Looking for Complexity

University of Glasgow chemist Lee Cronin believes he and his collaborators have found a way to recognize life as we know it and as we don’t know it.

The Pearly Clouds of Mars

Atmospheric scientist Mark Lemmon discusses the beautiful clouds on Mars imaged by NASA's Curiosity rover.

Amateur Astronomers Saving the World

Planetary Society grants have enabled amateur astronomers to discover and track asteroids that cross Earth’s path. We’ll meet two of them.

The New Great Space Observatories

Astrophysicist Grant Tremblay describes how four proposed space telescopes could reveal our solar system and the universe as never before.

Defenders of Earth on Planetary Radio

Six planetary defense leaders report on progress toward protecting Earth from near-Earth objects.

Space Policy Edition: How Starship at the Moon Brings NASA Closer to Mars

NASA chose SpaceX’s Starship as the sole winner of its human lunar lander development contract in a move that may also take us closer to Mars.

The High Frontier: A New Documentary About Gerard K. O’Neill

Gerard K. O’Neill envisioned vast, magnificent human settlements in space. His followers, including Jeff Bezos, are working to turn his vision into reality.

The First Space Shuttle Pilot: Bob Crippen on the 40th Anniversary of STS-1

Robert Crippen and John Young became the first humans to fly a space shuttle into orbit when Columbia launched on April 12, 1981.

InSight’s Mole: A Martian Science Odyssey

NASA engineer and scientist Troy Hudson shares the sad but ultimately inspiring story of a two-year attempt to dig deep beneath the surface of Mars.

Space Policy Edition: SpaceX's Early, Desperate Days (with Eric Berger)

Elon Musk’s SpaceX nearly failed 15 years ago as it struggled to launch its first rocket. Eric Berger has written about this challenging early era and how it helped create today’s successful, innovative company.

Spinoffs: How NASA Technologies Benefit Life on Earth

We examine a few of the thousands of technologies and innovations developed by NASA that are making lives better around our planet.

A Symphony for 7 Moons

Composer Amanda Lee Falkenberg is joined by Cassini project scientist Linda Spilker and retired astronaut Nicole Stott as she shares excerpts from The Moons Symphony.

Solar Cruiser: A Giant Sail Prepares for Space

NASA has given the green light to Principal Investigator Les Johnson and his team for construction of a solar sail that dwarfs all that have come before.

Planetary Society All-Stars Review 2020 Space Milestones

In spite of everything, 2020 was a good year for space exploration according to five of The Planetary Society’s experts.

Astronaut Stephanie Wilson Might Walk on the Moon

18 astronauts on the Artemis Team have a shot at walking on the Moon, and Stephanie Wilson is one of them.

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