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  • “Exploration is in our nature.” - Carl Sagan

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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Mat Kaplan and Linda Spilker with Enceladus model

Voyager Mission Project Scientist Linda Spilker

Cassini Mission Project Scientist Linda Spilker has now taken on the same job for the Voyager Interstellar Mission.

Carl Sagan with Viking lander model

Ann Druyan wishes you a happy Sagan Day

Celebrate Carl Sagan’s birthday with his longtime collaborator and life partner Ann Druyan.

NEOWISE artist's concept

DART smacked an asteroid! So what’s next in planetary defense?

The Double Asteroid Redirection Test was a brilliant success. The leaders of NASA’s Planetary Defense Coordination Office tell us what’s next in the quest to protect Earth.

Simons Observatory team at public event

Meet the new Planetary Radio host! (and enjoy a beer with a cosmologist)

20 years after its creation, Mat Kaplan is ready to introduce the great new host of Planetary Radio. We also join an assembly of astrophysicists as they toast each other and the cosmos.

LightSail 2 image of Mediterranean and the Red Sea

Sail on! Bill Nye and others celebrate LightSail 2’s three years in space

Celebrate the third anniversary of LightSail 2’s launch with Bill Nye and other leaders of The Planetary Society.

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