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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Crew Dragon Triumphant, and a Planetary Society Founder Remembers

Splashdown! The astronaut and former leader of Dragon capsule development at SpaceX is back to celebrate the spacecraft’s successful mission.

Stephen Hawking: Spaceflight Pioneer!

He is known for his breakthrough physics and popularizing of science, but Dr. Hawking also wanted to fly in space. Erik Viirre led the medical team that helped Stephen experience weightlessness.

Sailing on the Light of the Sun With Lou Friedman

The co-founder and Executive Director Emeritus of The Planetary Society returns for a conversation about the allure of sailing through space.

From Mars to the Stars With Lou Friedman

The founding Executive Director of the Planetary Society has just written “Human Spaceflight: From Mars to the Stars,” an optimistic view of humanity’s future in the solar system and beyond.

Celebrating the Admiral of the Solar System

The life of explorer and teacher Dr. Bruce Murray was celebrated last November 10th at Caltech. This week we present a few excerpts from the tributes paid to the former JPL Director and co-founder of the Planetary Society.

Can We Touch the Stars? Lou Friedman at the 100-Year Starship Symposium

Only days after Voyager 1 reached interstellar space, forward thinkers met in Houston, Texas to consider how humans can become a starfaring species. Planetary Society Emeritus Executive Director Lou Friedman reports from the meeting.

Remembering Bruce Murray

The passing of Planetary Society co-founder and former JPL Director Bruce Murray has been marked around the world. Planetary Radio takes its turn with this special tribute.

Celebrating Carl Sagan With Lou Friedman, Lynda Obst, Kip Thorne and More

November 9 was Planetary Society founder Carl Sagan's birthday, so we gathered a few of his close friends and several young scientists he inspired in front of a live audience. They also helped us celebrate Planetary Radio's 10th anniversary!

All-Star CalTech Panel Discussion: Moving an Asteroid

All-Star CalTech Panel Discussion: Moving an Asteroid

Lou Friedman: The Rebirth of Russian Space Exploration?

Lou Friedman: The Rebirth of Russian Space Exploration?

New Beginnings With Lou Friedman

New Beginnings With Lou Friedman

Going Behind the Scenes With LightSail 1

Going Behind the Scenes With LightSail 1

Falcon 9 Launch, Another Jupiter Smackdown, IKAROS...and a Surprise

Falcon 9 Launch, Another Jupiter Smackdown, IKAROS...and a Surprise

Planetary Society Executive Director Lou Friedman on solar sails IKAROS and LightSail-1

Planetary Society Executive Director Lou Friedman on solar sails IKAROS and LightSail-1

Planetary Society's Lou Friedman on NASA's New Plans

Planetary Society's Lou Friedman on NASA's New Plans

Lou Friedman Reviews the Augustine Human Spaceflight Report

Lou Friedman Reviews the Augustine Human Spaceflight Report

New Life for Hubble Space Telescope, New Leader for NASA

New Life for Hubble Space Telescope, New Leader for NASA

Lou Friedman on the Roadmap to Space

Planetary Society Exec. Director Lou Friedman on the new plan for human exploration of space.

Saving the Planet: The Apophis Mission Design Competition

Saving the Planet: The Apophis Mission Design Competition

Examining the Vision for Space Exploration: A Workshop Preview

Examining the Vision for Space Exploration: A Workshop Preview

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