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Planetary Radio: Space Exploration, Astronomy and Science

The Planetary Society

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

science

All Episodes

69:39

Portrait of a Scientist: A Conversation with Psyche...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/06/15

Lindy Elkins-Tanton’s wonderful new memoir is titled, “A Portrait of the Scientist as a Young Woman.” Host Mat Kaplan talks with Lindy about this sometimes harrowing, often heroic, and adventurous chronicle of her path toward leadership of the Psyche asteroid mission. This new conversation follows their brief encounter in a Jet Propulsion Lab clean room that we presented last May. Your chance to win Lindy’s book arrives in this week’s What’s Up segment with Bruce

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80:52

Planetary Radio at the Humans to Mars Summit

Planetary Radio: Space Exploration, Astronomy and... ·

2022/06/08

Join host Mat Kaplan in Washington D.C. for conversations with outstanding presenters at the first in-person Humans to Mars Summit in three years. You’ll hear from Inspiration 4 astronaut Sian Proctor, chief engineer for NASA’s robotic exploration program “Hoppy” Price, and the designer of award-winning Martian homes. NASA deputy administrator and former space shuttle commander Pam Melroy delivered a brilliant keynote. Then Bruce Betts tells us about the new STEP Grant

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54:12

Space Policy Edition: Inside the Planetary Science...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/06/03

Caltech planetary scientist and Planetary Society president Bethany Ehlmann was a key player in the creation of the recently released recommendations that may guide solar system exploration for years to come. SPE host Casey Dreier talks with her about the process and approach that led to this influential document. Discover more here: https://www.planetary.org/planetary-radio/bethany-ehlmann-decadal-surveySee omnystudio.com/listener for privacy information.

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99:19

Planetary Radio Live in London: The Moons Symphony

Planetary Radio: Space Exploration, Astronomy and... ·

2022/06/01

Host Mat Kaplan has returned from the UK and the recording of The Moons Symphony by the London Symphony Orchestra. You’ll hear excerpts from our Planetary Radio Live show celebrating this intersection of art and science with composer Amanda Lee Falkenberg and three distinguished planetary scientists. It was produced at Imperial College London before a live audience. Hear and discover more at https://www.planetary.org/planetary-radio/2022-planetary-radio-live-moons-symphonySee

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61:08

Cassini’s Dramatic End: A Planetary Radio Reprise

Planetary Radio: Space Exploration, Astronomy and... ·

2022/05/25

With Mat Kaplan in London for Planetary Radio Live, we bring back one of the most moving events in the history of our show. The Cassini orbiter plunged into Saturn in the early hours of September 15, 2017. Hundreds gathered to mark the end of this remarkable voyage, including former NASA chief scientists Jim Green, John Grunsfeld and Ellen Stofan. Mat talked with them and many others on that memorable morning. Then we’ll check in with Bruce Betts for a brand new What’s Up. Discover more

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79:27

Life, the Universe and Britney Schmidt

Planetary Radio: Space Exploration, Astronomy and... ·

2022/05/18

Our in-depth, fascinating conversation with Cornell University professor Britney Schmidt touches on how we’ll recognize life when we find it elsewhere, her sub-ice exploring robotic submarine, why we need an even bigger space telescope, and the best place for ice cream at Cornell. Planetary Society chief scientist Bruce Betts goes Hollywood with this week’s space trivia contest. Discover more at https://www.planetary.org/planetary-radio/2022-britney-schmidtSee omnystudio.com/listener for

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37:44

Perseverance Perseveres: A Mars rover update from Ken...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/05/11

Perseverance, the Mars 2020 rover, has begun an exciting new phase of its mission. Project scientist Ken Farley tells us why the ancient river delta it has entered is so enticing and intriguing. Ken also salutes Ingenuity, the Mars Helicopter, as we look forward to the day when samples of the Red Planet are sent to Earth. What role did the Wright brothers, those pioneers of powered flight, contribute to the Apollo and space shuttle programs? Bruce Betts has the answer in What’s Up. Discover

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71:47

Space Policy Edition: How Russia's Invasion of...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/05/06

It's not just the ISS partnership — commercial satellites, international cooperation, and managing space debris may all be impacted by the war in Ukraine. Professor Mariel Borowitz, an expert in international space policy and space sustainability, joins the show to discuss the immediate consequences, potential policy changes, and lessons the global community is learning from the conflict. Discover more here: https://www.planetary.org/planetary-radio/mariel-borowitz-ukraine-invasion-spaceSee

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46:27

Heavy Metal: An encounter with the Psyche spacecraft

Planetary Radio: Space Exploration, Astronomy and... ·

2022/05/04

Psyche is a 279 kilometer-wide (173 mile-wide) hunk of metal in space. Psyche is also a magnificent spacecraft that will soon head toward its namesake in the asteroid belt. Host Mat Kaplan recently visited the JPL clean room where the probe was in final preparation for launch. You’ll hear conversations with mission leaders including principal investigator Lindy Elkins-Tanton and project manager Henry Stone. We’re fresh out of metal asteroids at The Planetary Society, but you might win

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45:18

The End of Astronauts?

Planetary Radio: Space Exploration, Astronomy and... ·

2022/04/27

Do we need to send humans into space? Won't robots soon be smart enough and capable enough to do this dangerous work for us? These and other questions are explored by Martin Rees, Britain's Astronomer Royal, and astrophysicist/science author Donald Goldsmith in their thought-provoking new book, "The End of Astronauts: Why Robots are the Future of Exploration." They present their arguments in this week’s show. Then we climb Mount Kaplan with Bruce Betts to learn who has won the weekly space

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57:58

Yuri’s Night: Join the party!

Planetary Radio: Space Exploration, Astronomy and... ·

2022/04/20

Host Mat Kaplan joined the Los Angeles celebration of humanity becoming a spacefaring species. He talked with the Yuri’s Night founders and others under the Space Shuttle Endeavour. The much-anticipated Planetary Science and Astrobiology Decadal Survey was issued as we finished this week’s show. Planetary Society senior space policy adviser Casey Dreier will give us a brief overview of its recommendations. We’ll close with Bruce Betts and your chance to win a r-r-r-rubber asteroid

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70:24

Apollo 13 astronaut Fred Haise

Planetary Radio: Space Exploration, Astronomy and... ·

2022/04/13

“Never panic early” is both Fred Haise’s motto and the title of his new memoir. Join us for a wonderful hour of stories about the Moon mission that almost didn’t make it home, along with Fred’s memories of the early days of the space shuttle, the International Space Station and much more. You’ll also have the chance to win a copy of his book when Bruce Betts arrives for What’s Up. Discover more at

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65:52

Space Policy Edition: NASA's 2023 Budget Request

Planetary Radio: Space Exploration, Astronomy and... ·

2022/04/08

The Biden administration is proposing $26 billion for NASA next year, with significant increases benefiting the Artemis program, Mars Sample Return and Earth Science missions. But not everything is good news: NEO Surveyor and Mars Ice Mapper are both slated for significant cuts, and inflation may take a bite out of any increases NASA would receive on paper. With Congress facing elections in the fall, how likely is it that NASA will get this funding? What consequences will this have on Planetary

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45:19

Neptune Odyssey: why we need to visit an ice giant

Planetary Radio: Space Exploration, Astronomy and... ·

2022/04/06

Recommendations made in the 2023-2032 Planetary Science and Astrobiology Decadal Survey will be revealed on April 19. One of the 11 design studies commissioned for the survey explores a flagship mission to Neptune. The Neptune Odyssey project engineer is Brenda Clyde. Her colleague, Kirby Runyon, is the project scientist. They’ll take us inside this exciting concept and remind us of why an ice giant orbiter is long overdue. Even Bruce Betts and Mat Kaplan were surprised by the answer to this

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55:37

X-raying the universe with Martin Weisskopf

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/30

He helped invent X-ray astronomy more than 50 years ago. Martin Weisskopf still leads the field as project scientist for the spectacular Chandra X-ray Observatory and principal investigator for the brand new Imaging X-ray Polarimetry Explorer or IXPE. He’ll help us zero in on the most energetic and enigmatic objects in the cosmos. NASA’s fiscal year 2023 budget proposal has just been unveiled. Chief advocate Casey Dreier will break it down. We’ll close with the first words from the

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52:45

Legendary Space Physics Pioneer Margaret Kivelson

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/23

At 93, Margaret Kivelson is still at the center of space science and policy. In this charming conversation she shares anecdotes about her early life, how she entered the new field of space physics and some of her groundbreaking work, including discovery of convincing evidence for a saltwater ocean under the ice on Jupiter’s moon Europa. Bruce and Mat offer another great prize from Chop Shop in this week’s What’s Up space trivia contest. Discover more at

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33:15

Planetary Radio Special Edition: The Voyager Golden...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/18

We are honored to offer you this outstanding episode of one of our favorite podcasts. Twenty Thousand Hertz reveals the stories behind the world's most recognizable and interesting sounds. Here they present the Voyager Golden Record carried by those beloved spacecraft that have departed our solar system on a journey to the stars. We hope you'll enjoy it as much as we have. We'll be back with a regular episode of Planetary Radio every Wednesday.See omnystudio.com/listener for privacy information.

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61:02

Meet the first STEP Grant awardees

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/16

Citizen scientists will soon have another opportunity to become part of the search for extraterrestrial intelligence, and an innovative project will use a subtle effect of sunlight to learn about near-Earth objects. These are the projects funded in the first round of The Planetary Society’s Science and Technology Empowered by the Public (STEP) grant program. We’ll meet the awardees after Society chief scientist Bruce Betts provides an overview. Bruce returns for this week’s

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48:10

Water, water everywhere with Bethany Ehlmann

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/09

Planetary scientist Bethany Ehlmann has co-authored a paper presenting evidence that liquid surface water flowed on Mars as much as a billion years more recently than previously thought. That’s an extra billion years for possible life to have formed and thrived. We’ll also join Planetary Society editor Rae Paoletta as she explores water worlds throughout our solar system in a new article. Another great prize awaits the winner of the What’s Up space trivia contest. Discover more at

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87:36

Space Policy Edition: Why are outer planets missions...

Planetary Radio: Space Exploration, Astronomy and... ·

2022/03/04

It's the 50th anniversary of Pioneer 10, the first spacecraft to the outer planets. Pioneers 10 and 11 were scrappy, low-cost endeavors that blazed the path for future exploration. But the future has been expensive: outer planets missions are some of the priciest planetary probes in history. Can we get back to a pioneering spirit and increase the frequency of outer planet exploration? To find out, we talk with Mark Wolverton, author of “The Depths of Space: The Story of the Pioneer

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1,353 results

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