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.

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Planetary Radio

Hide and seek with Planet 9

Caltech's Mike Brown and Konstantin Batygin discuss their new paper, the latest evidence for Planet 9, and why they believe their hunt may soon be over.

Planetary Radio

Planetary Radio Live: All These Worlds…

Our live conversation about “Planet 9” and the amazing diversity of our solar system, featuring Konstantin Batygin and Mike Brown of Caltech, Senior Editor Emily Lakdawalla, Bill Nye the Science Guy and Cassini Project Scientist Linda Spilker.

Planetary Radio

Planet 9 From Outer Space!

Mike Brown and Konstantin Batygin fully expect a new and undemotable ninth planet will be found in the outer reaches of the solar system. The Caltech researchers talk about their findings and much more.

Planetary Radio

Planetary Radio Live at the New Horizons Pluto Encounter

Join our live audience for highlights of an amazing evening, featuring Jim Bell, Bruce Betts, Mike Brown, Emily Lakdawalla, Linda Spilker, and Bill Nye the Science Guy.