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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Space Policy Edition: Pathfinder and the Birth of the Discovery Program

Space exploration historian Michael Neufeld traces the fascinating history of one of NASA’s most successful programs of planetary exploration.

Space Policy Edition: Inside the Planetary Science Decadal Survey Process with Bethany Ehlmann

Professor Bethany Ehlmann served on the steering committee for the new planetary science and astrobiology decadal survey that will steer future exploration of the solar system.

Life, the Universe and Britney Schmidt

Britney Schmidt is preparing us for the day when a submarine will slip into the seas of an ocean world like Europa to search for life.

Perseverance Perseveres: A Mars rover update from Ken Farley

The Mars 2020 rover has rolled into an ancient river delta on the Red Planet. Will we find evidence of past life there?

Yuri’s Night: Join the party!

Thousands celebrated the 61st anniversary of the first human voyage into space. We’ll take you to the Los Angeles party under the Space Shuttle Endeavour.

Meet the first STEP Grant awardees

The Planetary Society’s new Science and Technology Empowered by the Public (STEP) grant program will let citizens join the search for ET and enable astronomers to discover the nature of hundreds of near-Earth asteroids.

Water, water everywhere with Bethany Ehlmann

Water may have flowed on Mars for a billion more years than was previously thought, giving possible life an extra billion years to thrive.

Astrobiologist David Grinspoon on life, the universe and everything

Astrobiologist and author David Grinspoon shares his thoughts about the search for life, where we might find it and how science works.

Space Policy Edition: What We're Watching in 2022

Planetary Society chief of D.C. operations Brendan Curry returns for a look ahead at what to expect in 2022.

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 conversation with the director of “Don’t Look Up”

Director Adam McKay and planetary defense expert Amy Mainzer join us for a conversation about the film and the science behind it.

Discovering life elsewhere: How can we be sure?

NASA’s Jim Green and Mary Voytek want the science community to develop tools that will help us evaluate potential evidence of life beyond Earth.

Into the anthropocosmos with Ariel Ekblaw

Into the Anthropocosmos is MIT Space Exploration Initiative director Ariel Ekblaw’s collection of innovations that will improve life in space and on Earth.

Spacecraft communications and navigation with Badri Younes

Spacecraft need a navigation and communication infrastructure to carry out their missions. Learn how NASA does it and what’s in store for the future.

Space Policy Edition: We're entering a new era of planetary defense (with Lindley Johnson)

The head of NASA’s planetary defense program discusses how the DART mission represents a new era for defending our planet from dangerous asteroids.

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.

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.

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