
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

Dec 15, 2021 • 1h 3min
JWST is ready for launch and amazing science
The James Webb Space Telescope will begin its mission of discovery as soon as Dec. 24. René Doyon, Heidi Hammel and Mike McElwain join us for a conversation about what it may reveal from our solar system to the edge of the universe. Doyon is principal investigator for the telescope’s NIRISS imaging spectrograph, Hammel is vice president for science at the Association of University for Research in Astronomy (AURA) and McElwain of the Goddard Space Flight Center is the JWST Observatory project scientist. What do chief scientist Bruce Betts and a horse have in common? Find out in the What’s Up space trivia contest. There’s always more to explore at https://www.planetary.org/planetary-radio/2021-jwst-pre-launch-rene-doyon-heidi-hammel-mike-mcelwainSee omnystudio.com/listener for privacy information.

Dec 8, 2021 • 53min
A conversation with the director of “Don’t Look Up”
The plot of the great new movie “Don’t Look Up” is driven by a giant comet speeding toward Earth and the scientists who want to divert it. Adam McKay directed this dark comedy. He and real-life planetary defense expert Amy Mainzer talk with Mat Kaplan about the science, the scientists, and much more. Then a group of Planetary Society colleagues share their thoughts about the film. Fans of Dr. Seuss will find something special in this week’s What’s Up with Bruce Betts. There’s always more to explore at https://www.planetary.org/planetary-radio/2021-adam-mckay-amy-mainzer-dont-look-upSee omnystudio.com/listener for privacy information.

Dec 3, 2021 • 1h 18min
Space Policy Edition: Astronomy Goes Big, with Heidi Hammel
The search for biosignatures on hundreds of exoplanets is the top goal for U.S. astronomers. That's the conclusion from the new, once-per-decade report from the National Academy of Sciences: Pathways to Discovery. In it, the field of astrophysics is analyzed and prioritized: establishing the major scientific questions, the tools to answer them, and how to best engage the human talent necessary to enable our continued investigation of the cosmos. Dr. Heidi Hammel, astronomer, Vice-President for Science at the Association of Universities for Research in Astronomy, and Vice President of The Planetary Society joins us to discuss the new results and what it means for the future of astronomy. Discover more here: https://www.planetary.org/planetary-radio/heidi-hammel-astrophysics-decadalSee omnystudio.com/listener for privacy information.

Dec 1, 2021 • 1h 10min
Discovering life elsewhere: How can we be sure?
Is it life? NASA chief scientist Jim Green and Mary Voytek, leader of the agency’s astrobiology program, are two authors of a paper that calls for a system or scale that will allow scientists and others to evaluate the validity and importance of evidence that points to life elsewhere in the solar system or across the galaxy. Planetary Society communications strategy adviser Kate Howells shares our gift list for the space fan in your life, while Bruce Betts takes us across the night sky toward a new space trivia contest. There’s more to explore at https://www.planetary.org/planetary-radio/2021-jim-green-mary-voytek-astrobiology-scaleSee omnystudio.com/listener for privacy information.

Nov 24, 2021 • 59min
Into the anthropocosmos with Ariel Ekblaw
Ariel Ekblaw and her Space Exploration Initiative colleagues believe we are at the cusp of interplanetary civilization. They are building the tools, environments and knowledge that will speed the transition and solve problems on Earth. Ariel has published Into the Anthropocosmos, a beautiful celebration of SEI’s fifth anniversary that presents many of its innovative projects. Someone will win a copy of the book in the new What’s Up space trivia contest. There’s more to explore at https://www.planetary.org/planetary-radio/2021-ariel-ekblaw-mit-space-exploration-initiativeSee omnystudio.com/listener for privacy information.

Nov 17, 2021 • 53min
The DART asteroid impact mission begins, with Nancy Chabot
DART coordination lead Nancy Chabot and the rest of the Double Asteroid Redirection Test team will see their spacecraft rocket toward asteroids Didymos and Dimorphos in a few days. She returns to Planetary Radio with a preview of the mission and its difficult challenge. Planetary Society editor Rae Paoletta takes us on a brief tour of the solar system’s volcanoes, and a special guest joins Bruce Betts and Mat Kaplan for What’s Up. There’s more to explore at https://www.planetary.org/planetary-radio/2021-dart-launch-nancy-chabotSee omnystudio.com/listener for privacy information.

Nov 10, 2021 • 60min
Spacecraft communications and navigation with Badri Younes
Badri Younes says that a spacecraft that can’t communicate or find its way is worthless. He leads SCaN, NASA’s Space Communications and Navigation program, which manages resources like the agency’s Deep Space Network. SCaN is also preparing for a future that relies on optical communication and possibly even quantum computing. Younes takes us on an audio tour of SCaN’s work that extends beyond our solar system. There’s more to explore at https://www.planetary.org/planetary-radio/2021-badri-younes-nasa-scanSee omnystudio.com/listener for privacy information.

Nov 5, 2021 • 1h 12min
Space Policy Edition: We're entering a new era of planetary defense (with Lindley Johnson)
The first in-space test of asteroid deflection technology, DART, launches this month. Lindley Johnson, NASA's planetary defense coordination officer, joins the show to talk about how this mission represents a new era for the agency's Planetary Defense program, and how it took nearly 25 years to convince policymakers, international partners, and even NASA that asteroid detection and deflection is an important use of taxpayer dollars. Casey and Mat also highlight the new Astrophysics decadal survey report and the federal ruling against Blue Origin in its effort to secure funding for its lunar lander. Discover more here: https://www.planetary.org/planetary-radio/lindley-johnson-dart-planetary-defenseSee omnystudio.com/listener for privacy information.

Nov 3, 2021 • 49min
Sarah Al Amiri and the new UAE mission to the asteroid belt
The chair of the United Arab Emirates space agency returns with news of an ambitious mission to explore seven asteroids. Sarah also shares the latest science from the Emirates Mars Mission Hope orbiter. The Planetary Society’s Kate Howells invites you to vote for the best space images and more from 2021. And we’ve got two space trivia contest winners to announce in the new What’s Up with Bruce Betts. There’s more to explore at https://www.planetary.org/planetary-radio/2021-sarah-al-amiri-uae-asteroid-missionSee omnystudio.com/listener for privacy information.

Oct 27, 2021 • 31min
Sally Ride: Revisiting our 2005 conversation
Host Mat Kaplan has wanted to reshare his first conversation with the great Sally Ride for years. Sally talks about women in space, the loss of space shuttle Challenger, and her devotion to sharing the wonders of science with young girls through Sally Ride Science. Planetary Society editor Rae Paoletta takes us to Jupiter’s Great Red Spot. Is it shrinking? We also celebrate the return of the space trivia contest. There’s more to explore at https://www.planetary.org/planetary-radio/2021-2005-sally-ride-interviewSee omnystudio.com/listener for privacy information.