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

Planetary Radio Episodes

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.

Sian Proctor and John Read with Baby's Guide to the Night Sky

Sian Proctor and John Read on teaching babies to love the Cosmos

Commercial space astronaut Sian Proctor and astronomer John Read join Planetary Radio to discuss “Baby's Guide to the Night Sky,” their new book introducing the youngest children to constellations and the wonders of the Cosmos.

Mat Kaplan floats in zero-G

Mat Kaplan’s first flight in zero-G

Former Planetary Radio host Mat Kaplan joins Space for Humanity and Zero-G for a flight that brings weightlessness and wonder to a diverse group of space dreamers. Hear voices from the flight and reflections on what it means to open space to everyone.

Newsome, Watkins, and Proctor at Yuri’s Night 2023

Yuri’s Night: For all SpaceKind

Join us as we delve into the heart of LA's 2023 Yuri's Night party, a celebration commemorating Yuri Gagarin's pioneering 1961 voyage into space.

Mars X-House

Planetary Radio at the Humans to Mars Summit

Mat Kaplan helped host the Humans to Mars Summit in Washington D.C., where much of the community that is working to get us to Mars gathered.