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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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.

Experimental Cosmologist Brian Keating

A fascinating, wide-ranging conversation with Brian Keating, director of the Simons Observatory that will search for our cosmic origins from a mountaintop in Chile’s Atacama region.

The Royal Astronomical Society at 200

Celebrating the 200th anniversary of the Royal Astronomical Society and the life of the late astronomer Margaret Burbidge.

Quasars and Quanta: Exploring Einstein’s Quantum Riddle

Even though his own work led to it, Albert Einstein never cared for quantum mechanics concepts like entanglement, which he called “spooky action at a distance.” While there’s no doubt it is real, could something even more mysterious be hiding under it?