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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

Imaging Hot Young Jupiters

10/06/2015 | 28:50


Franck Marchis is on the team that has delivered an actual image of a young, hot world about 100 light years from Earth. We talk with him on the 20th anniversary of the first exoplanet discovery.

More Info & Listen »

A Small, Distant World: Kepler 138b

07/14/2015 | 28:50


SETI Institute scientist Jason Rowe returns to tell us about the smallest exoplanet so far that has had its size and mass determined. Jason also talks with Mat about our ever-expanding knowledge of these worlds that circle faraway stars.

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A Recipe for a Small Planet

01/20/2015 | 28:50


Astronomer and planetary scientist Courtney Dressing is the lead author of research that may have found the formula for the mass and composition of Earth-like planets. She reveals the ingredients and why she spent time at JPL while in high school.

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Sara Seager and the Search for Earth’s Twin

12/16/2014 | 29:42


  • Sara Seager, Astrophysicist and Planetary Scientist, Massachusetts Institute of Technology

MIT planetary scientist and astrophysicist Sara Seager is on a quest. She wants to find a warm, wet exoplanet with signs of life. It could be Earth 2.0.

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Yale’s Debra Fischer and the Ever More Precise Search for New Worlds

10/14/2014 | 28:50


It’s terribly hard to find exoplanets that look like our homeworld. The search requires development of astoundingly powerful and precise instruments. That’s the job Debra Fischer and her team have taken on.

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The Search for Extraterrestrial Polluters?

08/12/2014 | 28:50


  • Henry Lin, Student, Harvard Smithsonian Center for Astrophysics

Harvard’s Henry Lin led work that determined the soon-to-be-launched James Webb Space Telescope may be able to detect an alien civilization by analyzing its atmosphere.

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Elisa Quintana on the Discovery of Earth 2.0

06/24/2014 | 28:50


Kepler-186f is the very first exoplanet that is both the size of our own world and in the habitable zone surrounding its star. SETI Institute scientist Elisa Quintana is lead author of the paper announcing its existence.

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A Second Earth, and OSIRIS REx is Go for Asteroid Bennu

04/22/2014 | 28:50


  • Dante Lauretta, OSIRIS-REx Principal Investigator, University of Arizona
  • Elisa Quintana, Kepler Mission Research Scientist, SETI Institute

Finally found: an Earth-sized planet in the habitable zone. You’ll hear lead scientist Elisa Quintana make the announcement. Then OSIRIS REx mission Principal Investigator Dante Lauretta will tell us how the spacecraft will return a sample of material from the birth of the solar system.

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Exploring Black Holes and Supernovae With NuSTAR

03/11/2014 | 35:00


Principal Investigator Fiona Harrison provides an X-ray tour of some of the universe's most fascinating objects, Casey Dreier has analysis of NASA's 2015 budget plans, and Bill Nye sees the inherent optimism of science in the verification of another 715 exoplanets.

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Verified: More Than 700 New Worlds

03/04/2014 | 28:50


SETI Institute researcher and member of the Kepler team Jason Rowe helps us dig into the latest big announcement about hundreds of planets in solar systems like our own.

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