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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 planetaryradio@planetary.org.

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

McDonald Observatory and the Quest for Dark Energy

April 19, 2017 • 48:20

The University of Texas at Austin’s observatory is high in the hills of west Texas. In this special episode, Mat Kaplan joins the tens of thousands who visit it each year. The occasion was the dedication of the vastly upgraded Hobby-Eberly Telescope, third largest on Earth.

Aerospace Corporation President and CEO Steve Isakowitz

April 12, 2017 • 58:09

The Aerospace Corporation has been innovating since 1960. Now it’s headed by a former leader of “New Space” company Virgin Galactic. President and CEO Steve Isakowitz talks about the evolving culture of the space industry.

Space Policy Edition #11 – Big Science and a Skinny Budget

April 07, 2017 • 1:19:06

Whether it’s discovering gravity waves, curing cancer or building a space station, the biggest science challenges increasingly require investments that are beyond what private industry can afford and collaborations that include many nations. Casey, Jason and Mat look at the history of big science and the outlook for future efforts. The team also reviews the 2018 budget proposed for NASA by the Trump Administration, and shares other space policy news from Washington.

Mars’ Atmosphere…Lost in Space!

April 05, 2017 • 33:17

Mars was once a warm and wet world. Then its dense, protective atmosphere mostly vanished. Learning why was one of the greatest mysteries in planetary science. The answer has just been delivered by the MAVEN orbiter.

Nancy Atkinson’s Incredible Stories from Space

March 29, 2017 • 47:09

The longtime editor of outstanding online space news source Universe Today has just written about nine robotic missions of exploration in "Incredible Stories From Space: A Behind-the-Scenes Look at the Missions Changing Our View of the Cosmos."

Ready for Space: LightSail 2 Update

March 22, 2017 • 34:49

The Planetary Society’s LightSail 2 solar sail spacecraft is ready to be packed away for its ride to orbit on a SpaceX Falcon Heavy rocket. Mat Kaplan checks the mission’s status with team members.

The Great American Eclipse—Be Part of It!

March 15, 2017 • 36:27

It’s coming! Will you be in the path of totality? Astronomers Without Borders President Mike Simmons says be there if you can.

Hope for Pluto—Should We Re-Redefine Planets?

March 08, 2017 • 33:51

Planetary geologist Kirby Runyon is lead author of an abstract that proposes a new, geophysical definition of what a planet is.

Space Policy Edition #10 - Special Guest Laura Delgado Lopez, SpaceX to the Moon, looming budget cuts

March 03, 2017 • 1:19:25

Laura Delgado Lopez from the Harris Corporation joins us to talk about the growing number of countries getting into the space business, particularly in Latin America. Casey, Jason, and Mat also take stock of SpaceX's plans to send humans around the Moon in 2018, and how the newly-announced Trump budget cuts could hurt NASA.

The Worlds of TRAPPIST-1

March 01, 2017 • 33:56

The discovery of seven, Earth-sized planets in a nearby solar system was announced last week. Astrophysicist and planetary scientist Sara Seager joins us to share her excitement about this find that includes three planets in the habitable zone.

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