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Planetary Radio

Planetary Radio

Each week, Planetary Radio visits with a scientist, engineer, project manager, astronaut, advocate or writer who provides a unique and exciting perspective on the exploration of our solar system and beyond. We also showcase regular features that raise your space IQ while they put a smile on your face.  Host Mat Kaplan is joined by Planetary Society colleagues Bill Nye the Science Guy, Bruce Betts, and Emily Lakdawalla. We hit the road now and then to produce a Planetary Radio Live show in front of an audience.  Drop us a line or enter the weekly space trivia contest at

Please support your local public radio station that airs the show! Check the station's online schedule or review our online list of affiliates. Satellite radio listeners can hear us Sunday evenings on the Sirius XM Public Radio channel.  Want to hear Planetary Radio on your local station? Ask them to contact us or review our radio affiliate information page.

iTunes and other podcast aggregators like Stitcher make it easy to listen and subscribe. Just search for "Planetary Radio." or click the links below.

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Recent Shows

Rocket Road Trip!

09/27/2016 | 33:17


Planetary Society Digital Editor Jason Davis returns with the story of the ten-day trek across the South he just completed with two Society colleagues.

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Could the Soviet Union Have Won the Space Race?

08/23/2016 | 46:49


Space historian and policy expert John Logsdon joins Mat Kaplan for a fascinating conversation about how the US could have lost the race to the moon.

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Sailing the Canyons of Titan

08/16/2016 | 38:39


Steep canyons on Saturn's moon Titan are filled with liquid methane. That's the discovery just announced by an international team of Cassini scientists, including Alex Hayes.

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2015: A Great Year for Space Exploration

12/29/2015 | 28:50


Our year-end review features the “best of 2015” lists from Jason Davis, Casey Dreier, Emily Lakdawalla and Bill Nye the Science Guy. What’s Up offers planets, a comet, and a nice prize package for the space trivia contest.

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A 35th Anniversary Party With Neil Tyson!

11/03/2015 | 31:47


It was a grand night at the Pasadena Civic Auditorium. CEO Bill Nye led the Planetary Society’s 35th anniversary party with guests including Neil deGrasse Tyson and Deputy NASA Administrator Dava Newman. We present a very brief sampling of the celebration.

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Pluto Amazes!

10/20/2015 | 38:40


  • Hal Weaver, New Horizons Project Scientist, Johns Hopkins University Applied Physics Lab

Hal Weaver is a very happy Project Scientist. His New Horizons spacecraft has shocked his fellow researchers with magnificent images and data. He shares the excitement this week.

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Big Rockets and Little LightSails

10/13/2015 | 28:50


Digital editor Jason Davis is a lucky guy. He follows and reports on human spaceflight progress, as well as the progress of the LightSail solar sail, which is about a year from its next flight.

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Flying High on SOFIA

09/08/2015 | 32:25


  • SOFIA Team, The crew, scientists, engineers, educators and other aboard SOFIA

Planetary Radio returns to SOFIA, the Stratospheric Observatory for Infrared Astronomy, but this time we fly in the giant 747 turned telescope platform. It was a night to remember.

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Cassini Update AND LightSail Spreads its Wings!

06/09/2015 | 28:50


  • Linda Spilker, Cassini Project Scientist, Jet Propulsion Laboratory

Cassini Project Scientist Linda Spilker, returns with another update on the magnificent mission at Saturn. You’ll also hear Bill Nye and the moment when LightSail began to deploy its solar sail.

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Countdown to LightSail: An Update

04/28/2015 | 28:50


The road to space has been a rocky one for most spacecraft, and LightSail is no different. Challenges remain even with the May 20th launch of a test mission approaching. Embedded LightSail reporter Jason Davis checks in with the latest news.

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