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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Sampling an Asteroid and Searching for Life in Venus' Clouds

The OSIRIS-REx spacecraft appears to have collected its first sample from asteroid Bennu, while a team led by Jane Greaves has discovered what could be evidence of life in the clouds of Venus.

Beyond Earth’s Edge: A Celebrity Space Poetry Jam!

Creators of an outstanding new collection of poems about spaceflight and exploration join Mat Kaplan to talk about the book as Bill Nye and other notables read selections.

Protectors of Earth! (and Other Worlds)

NASA’s planetary protection officer joined Mat Kaplan’s Humans to Mars summit panel for a great conversation about protecting worlds throughout the solar system from what could be devastating contamination.

Space Policy Edition: Divining Biden's Space Policy with Jeff Foust

Where would a Biden Administration take US space policy and NASA? Casey Dreier and space journalist Jeff Foust synthesize a best guess based on the available evidence.

Exploring the Cosmos with Heidi Hammel and AURA

Astronomer and planetary scientist Heidi Hammel’s AURA shines bright across our solar system and beyond.

A Fond Farewell: Solar System Specialist Emily Lakdawalla

Planetary Society Solar System Specialist Emily Lakdawalla makes a big announcement, and shares stories from her long history with the organization.

Have We Found Evidence of Life on Venus?

It could be a profound and historic discovery made on Earth’s nearest planetary neighbor.

Space Policy Edition: The Moon-to-Mars Strategy, with Dr. Scott Pace

The National Space Council’s Scott Pace talks with Casey Dreier about the current administration’s sweeping new strategy that integrates all elements of space development and exploration.

A Planetary Mystery is Solved, and it’s Bill Nye’s Anniversary!

Former Dawn mission director Marc Rayman of JPL reveals the secrets of the bright spots on dwarf planet Ceres, and we celebrate 10 years as Planetary Society CEO with Bill Nye.

The Sirens of Mars Call to Us

Georgetown University planetary scientist Sarah Stewart Johnson chronicles the long history of our fascination with Mars and the possibility of life there, culminating with Perseverance, the new rover now headed there.

Katie Mack and The End of Everything

How will the universe end? That’s the question explored by cosmologist Katie Mack in her very entertaining new book.

Why Aren't There More Earth-Like Planets in our Solar System?

New research reveals why Earth is on its own in this solar system’s habitable zone where liquid surface water flows, but the same isn’t true across the galaxy.

Another Ray Gun Heads for Mars. We Hear It Working.

SuperCam principal investigator Roger Wiens shares how his new and improved laser-based spectrometer will help look for past life in Jezero Crater, while its microphone lets us listen to the Red Planet.

Space Policy Edition: Why the SLS is a National Asset, and Why That Matters

The Coalition for Deep Space Exploration’s Mary Lynne Dittmar talks with Casey Dreier about how and why spacefaring nations prioritize funding for space development and exploration.

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.

Hope Leads the Way to Mars

Our special guests are the leaders of the Emirates Mars Mission whose Hope spacecraft is now headed for the Red Planet.

A Mars Mission Begins, a Comet Exits, and the Future of Planetary Science

The United Arab Emirates is headed for Mars as comet NEOWISE speeds back to the outer reaches of the solar system, and three white papers address the future of planetary science and defense.

How Perseverance will Search for Life on Mars

Join the mission’s deputy project scientist as the Perseverance rover prepares to search for life on the Red Planet.

To Pluto and Beyond with Alan Stern

Principal Investigator Alan Stern returns on the 5th anniversary of the New Horizons encounter with Pluto to tell us about the wealth of knowledge the spacecraft is still sending home from across the solar system.

Space Policy Edition: A Trillion-Dollar Space Economy?

How big is the space economy, and how big might it grow? Space policy expert Dr. Bhavya Lal brings the numbers down to Earth in a great conversation with Casey Dreier.

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