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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

Leaving Behind a Life on Mars—Former Curiosity Project Scientist John Grotzinger

03/17/2015 | 34:46


  • John Grotzinger, Curiosity Project Scientist, California Institute of Technology

The Mars Science Laboratory rover has accomplished its primary goals on the Red Planet, and John Grotzinger has left his central role to become Chair of the Division of Geological and Planetary Sciences at the California Institute of Technology. He shares his thoughts about the ongoing mission and much more.

More Info & Listen »

Jonathan Goff Says Let’s Redirect an Asteroid

02/24/2015 | 28:50


ARM is the Asteroid Redirect Mission, and sometimes it seems that it doesn’t have a friend in the world. But it does, and Jonathan Goff of Altius Space Machines is one.

More Info & Listen »

LightSail Prepares to Take Flight

01/27/2015 | 28:50


The Planetary Society has just announced that LightSail will be launched into orbit on its first test flight in May. We’ll talk with Project Manager Doug Stetson and embedded LightSail reporter Jason Davis about what to expect.

More Info & Listen »

2014: The Year in Space

12/30/2014 | 28:50


Our annual review of the greatest events and accomplishments over the last year features analysis and commentary by Bill Nye the Science Guy, Emily Lakdawalla, Jason Davis, Casey Dreier and Bruce Betts, along with a special new year’s gift of Neil deGrasse Tyson.

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Orion Launches Into History

12/09/2014 | 28:50


NASA’s Orion spacecraft has taken its first step toward Mars and an asteroid mission. The Planetary Society’s Jason Davis was at the Kennedy Space Center for the December 5 mission.

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Digging Deep With Kris Zacny and the Planetary Deep Drill

11/11/2014 | 28:50


  • Kris Zacny, Vice President and Director of Exploration Technology, Honeybee Robotics

If there’s life on Mars, it’s probably deep beneath the surface. That’s just one reason we need a tool like Planetary Deep Drill on the red planet and other mysterious worlds around our solar system. Honeybee Robotics’ Kris Zacny introduces us to the innovative prototype.

More Info & Listen »

A Conversation With Congressman Lamar Smith

09/30/2014 | 28:50


  • Lamar Smith, Chairman of the Science, Space, and Technology Committee, U.S. House of Representatives

The Chairman of the powerful Science, Space and Technology Committee in the U.S. House of Representatives joins us for a talk about planetary science, Europa, a human flyby of Mars and much more.

More Info & Listen »

Alan Stern and a Big Milestone on the Way to Pluto

08/26/2014 | 28:50


  • Alan Stern, New Horizons Principal Investigator, Johns Hopkins University Applied Physics Laboratory

New Horizons passed through the orbit of Neptune on August 25th. By cosmic coincidence, this was the 25th anniversary of Voyager 2’s flyby of that big, blue world. We catch Principal Investigator Alan Stern right after a celebration in Washington.

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Journey to the Center of Jupiter: Creating Fantastic Pressure With the World’s Largest Lasers

08/19/2014 | 29:52


Physicist Gilbert "Rip" Collins of the Lawrence Livermore National Lab will tell us about recent use of the world’s most powerful lasers to recreate conditions at the cores of giant planets.

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Planetary Radio Live: The LightSail Countdown Begins!

07/15/2014 | 28:50


LightSail, the Planetary Society’s innovative solar sail cubesat, will ride into space on the huge SpaceX Falcon Heavy, now in development. Bill Nye and others join us for a live celebration of this announcement.

More Info & Listen »

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