
Planetary Radio: Space Exploration, Astronomy and Science
Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you inside the DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.
Latest episodes

Jul 5, 2019 • 1h 45min
Space Policy Edition: Why Apollo Happened (with Roger Launius)
Half a century has passed since Neil Armstrong and Buzz Aldrin imprinted humanity's first footsteps upon another world. Apollo 11 was the culmination of a decade's worth of fervent activity in which the United States marshaled resources and manpower at a pace not seen outside of warfare. Space historian Dr. Roger Launius joins the show to explain why Apollo happened the way it did, how a moonshot briefly became a solution to a national security problem, and why it is unlikely to happen again. Casey Dreier also provides a space policy update. More resources about this month’s topics are at http://www.planetary.org/multimedia/planetary-radio/show/2019/space-policy-edition-39.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jul 3, 2019 • 50min
LightSail Takes Flight!
A giant SpaceX Falcon Heavy lifted off in the early hours of June 25th. One week later, the LightSail 2 solar sail was released to begin its epic mission. You’ll join the thrilling launch, meet LightSail team members and leaders of other missions, and get a solar sail update in this very special episode. You’ll also get the chance to win an ISS Above system in the What’s Up space trivia contest! Learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0703-2019-light-sail-2-launch.html Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jun 26, 2019 • 38min
The News From Saturn-With Linda Spilker
It has been many months since the great Cassini spacecraft plunged into Saturn’s atmosphere and fiery death. Yet the mission lives on as the reams of data and images reveal much more of this beautiful world, its rings and its moons. Project Scientist Linda Spilker is back with Mat to provide a fascinating update. We close with Bruce Betts and and a What’s Up segment that anticipates the mission of LightSail 2. Learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0626-2019-cassini-update-spilker.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jun 19, 2019 • 48min
Flight by Light: A LightSail 2 Mission Preview
The day is almost here. With the launch of a Falcon Heavy rocket, The Planetary Society will begin its mission to prove that a tiny, orbiting spacecraft can be propelled by the light of the Sun. Society Chief Operating Officer Jennifer Vaughn provides a passionate history of our efforts and reviews the opportunities for everyone to get involved. Then LightSail Program Manager Bruce Betts and Digital Editor Jason Davis will dig into this amazing mission and spacecraft. Society CEO Bill Nye will make the basics of solar sailing fun in his special presentation, right after this week’s What’s Up segment. Learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0619-2019-lightsail-2-preview.html Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jun 12, 2019 • 58min
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? We’ll talk with three eminent physicists and physicist/science fiction author David Brin about the Nova documentary on this subject. Planetary Society Chief Advocate Casey Dreier analyzes President Donald Trump’s recent tweet about the Moon and Mars, and Senior Editor Emily Lakdawalla introduces a new edition of The Planetary Report, now available to all. You can learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0612-2019-quantum-riddle.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jun 7, 2019 • 2h 4min
Space Policy Edition: The Soviet Moonshot (with Asif Siddiqi)
The U.S. won the space race in July of 1969 with the success of Apollo 11. But was the Soviet Union even racing? How close were they to beating the United States to the Moon? Soviet space historian Dr. Asif Siddiqi discusses the other side of the space race as we kick off our multi-part series of interviews celebrating the 50th anniversary of the first Moon landing. Planetary Society Chief of Washington Operations, Brendan Curry, also joins the show to catch up on the latest news about the White House proposal to return to the Moon by 2024. More resources about this month’s topics are at http://www.planetary.org/multimedia/planetary-radio/show/2019/space-policy-edition-38.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

Jun 5, 2019 • 1h 1min
Starchaser: Extraordinary Astronomer Jay Pasachoff
Jay Pasachoff visits Planetary Society headquarters for a conversation about the latest edition of his and Alex Filippenko’s monumental textbook The Cosmos. But that’s just the start of a discussion that explores solar astronomy, art and science, the history of astronomy and Jay’s nearly 60-year history of total solar eclipse observations. The Planetary Society’s LightSail 2 may look like LightSail 1, but Jason Davis tells us there are important differences between these spacecraft, beginning with their missions. What’s Up brings another opportunity to win Alan Stern’s great book, Chasing New Horizons in the space trivia contest. You can learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0529-2019-jay-pasachoff.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

May 29, 2019 • 55min
Sharing a Passion for Mars at the Humans to Mars Summit
This year’s Humans to Mars Summit in Washington DC once again ended with a panel of Martian all-stars talking about their hopes for a future that includes the Red Planet. Planetary Radio host Mat Kaplan leads the inspiring and entertaining discussion. Emily Lakdawalla shows us the beautiful, sunlit clouds of Mars, while this week’s What’s Up segment gives Mat the job of singing the answer to our latest space trivia quiz. You can learn more about all of this week’s topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0529-2019-2019-h2m-closing-panel.htmlLearn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

May 22, 2019 • 45min
Talking with NASA Administrator Jim Bridenstine
The former Oklahoma congressman and Navy aviator stepped into the leadership role barely a year ago. Now he wants to see humans back on the Moon by 2024 as a vital stepping stone to Mars. Join us for a wide-ranging conversation about this ambitious plan and much more. Planetary Society Chief Scientist Bruce Betts continues the countdown to launch of LightSail 2 before he takes us across the heavens in What’s Up. You can learn more about this week’s guests and topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0522-2019-2019-jim-bridenstine.html Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.

May 17, 2019 • 4min
BONUS: Introducing Science Rules! with Bill Nye
Host Mat Kaplan has a special announcement to share about Planetary Society CEO Bill Nye. The Science Guy is on a mission to change the world— one phone call at a time. On his new podcast, Science Rules!, he tackles the curliest questions on just about anything in the universe. Perhaps you’ve wondered: Should I stop eating cheeseburgers to combat climate change? How often should I really be washing my pillowcase? Can I harvest energy from all those static-electricity shocks I get in the winter? Science Rules! Is out NOW - find it in your favorite podcast app. Learn more about your ad choices. Visit megaphone.fm/adchoicesSee omnystudio.com/listener for privacy information.See omnystudio.com/listener for privacy information.