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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

91:30

Space Policy Edition: Why the SLS is a National...

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

2020/08/07

How spacefaring nations prioritize funding can be just as important, if not more so, than the capabilities of the commercial sector, says Dr. Mary Lynne Dittmar, President and CEO of the Coalition for Deep Space Exploration. She joins the show to talk how these complement each other, and why the SLS and Orion programs deserve support along with work by companies like SpaceX and Blue Origin. Mat and Casey also catch up on the dizzying amount of space news in July, including important progress on

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78:13

Crew Dragon Triumphant, and a Planetary Society...

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

2020/08/05

Astronaut and former SpaceX director of space operations Garrett Reisman returns to help us celebrate and appreciate the just-completed first crewed mission by a Crew Dragon capsule. Then we settle in with Planetary Society Emeritus Executive Director Lou Friedman for great stories from his new memoir, Planetary Adventures: From Moscow to Mars.Chase Chief Scientist Bruce Betts down the rotating black hole and get ready for the Perseid meteor shower in this week’s What’s Up.Great links and more are

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58:31

Hope Leads the Way to Mars

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

2020/07/29

An exclusive conversation with science lead Sarah Al Amiri and project director Omran Sharaf of the Emirates Mars Mission.Their Hope orbiter is now on its way to the red planet.NASA Associate Administrator Thomas Zurbuchen has praise for the Emirates mission and looks forward to the beginning of the Perseverance rover’s own journey. Are you as good as NASA at creating acronyms? Take your best shot in the new What’s Up contest, as Bruce Betts waves farewell to comet NEOWISE. Learn more at

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69:05

A Mars Mission Begins, a Comet Exits, and the Future...

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

2020/07/22

The United Arab Emirates Hope spacecraft has begun its journey to Mars. We’ll join a virtual launch party attended by mission leaders, NASA Administrator Jim Bridenstine, National Air and Space Museum director Ellen Stofan and others. Comet NEOWISE is still putting on a show! Learn more about it from NEOWISE principal investigator Amy Mainzer, NASA planetary defense officer Lindley Johnson and JPL scientist Emily Kramer. Our own Casey Dreier provides an overview of three far-sighted white papers

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63:37

3 Billion Years Ago: Was Mars Alive?

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

2020/07/15

Perseverance, NASA’s 2020 rover, leaves for the Red Planet in just days. Deputy project scientist Ken Williford tells us how it will look for signs of past life where there was once a Martian lake. He’ll also take us through his Jet Propulsion Lab facility where scientists are learning how to recognize the evidence of long ago biology here on Earth. Comet NEOWISE is still lighting up the northern hemisphere sky. Bruce Betts knows where to find it. We’ve also got great new prizes for the space trivia

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52:06

To Pluto and Beyond with Alan Stern

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

2020/07/08

It has been 5 years since the New Horizons probe revealed beautiful, surprising Pluto, and 18 months since it showed us the odd little body now known as Arrokoth. Principal Investigator Alan Stern shares the latest science, and tells us what the spacecraft is up to now as it races toward the edge of our solar system. Have you seen the new comet? Bruce Betts tells you where and how to look in this week’s What’s Up. Learn more at

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64:06

Space Policy Edition: A Trillion-Dollar Space Economy?

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

2020/07/03

Dr. Bhavya Lal joins the show to discuss the size of the space economy, where it's going, and how the term itself can mean many different things to many different people. In a world filled with breathless claims about trillion-dollar economies, we dive down into the fundamental assumptions about space commerce, its potential for growth, and the pitfalls of motivated thinking in the hyper-optimistic space community. Learn more about this month’s topics through links on the show page.

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53:51

Jim Bell Sends New Eyes to Mars

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

2020/07/01

Mastcam-Z is the main camera system that will soon leave for Mars as part of the Perseverance rover. Mastcam-Z Principal Investigator Jim Bell is back to tell us about what the most powerful set of eyes to reach the surface of the Red Planet may show us. Planetary Society Solar System Specialist Emily Lakdawalla explores four sample return missions headed out across our solar system. The Antikythera Mechanism, an ancient Greek computing device, anchors this week’s What’s Up segment with Bruce

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51:40

China on the Final Frontier

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

2020/06/24

Low Earth orbit, the Moon, Mars, even Neptune and the edge of the solar system--China’s ambitious plans for space exploration and development are laid out by Planetary Society contributing editor and Chinese space program expert Andrew Jones. Jason Davis provides a brief overview of what’s in the June Solstice edition of The Planetary Report, now available for free.And it’s time to give away ice cream on What’s Up! Learn more at

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51:31

LightSail 2: A Year of Solar Sailing

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

2020/06/17

The LightSail 2 team and 50,000 supporters around the world will celebrate the little spacecraft’s first anniversary on orbit in a few days. Planetary Society Chief Operating Officer Jennifer Vaughn remembers the long road to this accomplishment. LightSail Program Manager Bruce Betts and LightSail Project Manager Dave Spencer tell us what we’ve learned over the last year and look to the future of solar sailing. Dave also reveals his exciting new job at the Jet Propulsion Lab. Learn more at

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57:07

Staying Alive in Space

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

2020/06/10

Keeping humans alive and well in space is hard enough. How will this be accomplished on a 3-year journey to Mars and back? Paragon President and CEO Grant Anderson shares the great progress we’ve made and the remaining challenges. Astronauts headed for the Red Planet may not need ice cream to stay alive, but will life be worth living without it? You may win a pint of Ben & Jerry’s moooony new flavor and a Netflix Space Force spoon to eat it with in this week’s space trivia contest.Learn more at

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77:25

Space Policy Edition: NASA’s Gamble Pays Off

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

2020/06/05

SpaceX's Crew Dragon safely carried 2 astronauts to the ISS, nearly a decade after NASA made a huge bet on commercial partnerships to solve a problem of access to the space station. Casey and Mat explore how NASA gained the political will to fundamentally re-imagine its relationship with the private sector. Will it spur a new market for sending humans into space? Chief of D.C. Operations Brendan Curry offers an update on Congress and the outlook for NASA's major programs in a period of unrest and

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48:06

Crew Dragon Thrills While Mars Chills

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

2020/06/03

This episode opens with a special message about The Planetary Society’s response to recent news, followed by a period of silence that marks the unjust loss of George Floyd and other black men and women. In our regular coverage, we celebrate the successful launch and arrival of the Crew Dragon spacecraft at the International Space Station.Then it’s off to Mars with planetary scientist Edgard Rivera-Valentin. Learn more at

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61:52

Celebrating 30 Years of Hubble with Astronaut John...

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

2020/05/27

Former astronaut and NASA Associate Administrator John Grunsfeld is often called the Hubble Repairman. He made three space shuttle trips to the space telescope to repair and upgrade it. Now he looks back over three decades of science, beautiful images, and inspiration delivered by the HST. Rubber asteroids are back, and you might win one in the new What’s Up space trivia contest. Great links, including to Mat Kaplan’s live interview with John Grunsfeld, are at

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43:47

Crew Dragon Deep Dive with Astronaut Garrett Reisman

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

2020/05/20

Engineer and former astronaut Garrett Reisman spent four months on the International Space Station before moving to SpaceX. Ten years of work at the company are about to climax when a Crew Dragon capsule carries astronauts Bob Behnken and Doug Hurley to the ISS. Garrett shares his excitement and inside knowledge about the mission and the groundbreaking spacecraft. We’ve also got headlines from The Downlink, and a night sky update as part of this week’s What’s Up. Great links, including the Crew

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53:01

Looking for Life in Alien Oceans

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

2020/05/13

Jet Propulsion Lab astrobiologist Kevin Hand has just written Alien Oceans: The Search for Life in the Depths of Space. Kevin and Mat explore these seas and whether they may have nurtured organisms with no connection to life on Earth. You may win a copy of Kevin’s excellent book in this week’s What’s Up space trivia contest with Bruce Betts. Take an even deeper dive at https://www.planetary.org/multimedia/planetary-radio/show/2020/0513-2020-kevin-hand-alien-oceans.htmlSee omnystudio.com/listener for

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58:02

The Crew Dragon Countdown Begins, With Former NASA...

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

2020/05/06

Lori Garver may have been the strongest advocate of commercial space development in her days at NASA. Now one of that program’s greatest goals is about to achieved with the flight of American astronauts to the International Space Station in a Crew Dragon spaceship. The Planetary Society’s Jason Davis previews what to expect from the SpaceX Demo-2 mission.Also, headlines from The Downlink, and Venus shining bright in What’s Up with Bruce Betts. Learn more about Lori Garver and the Crew Dragon mission

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71:17

Space Policy Edition: Our Moral Obligation to Explore...

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

2020/05/01

Are we morally obligated to pursue space exploration? What ethical considerations should we consider when creating space policy? Philosopher James Schwartz joins the show to address these questions and talk about his new book,The Value of Science in Space Exploration. Learn more about this month’s topics through links on the show page. https://www.planetary.org/multimedia/planetary-radio/show/2020/space-policy-edition-49.htmlSee omnystudio.com/listener for privacy information.See

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55:34

Life on Mars: Joining the Quest with Penny Boston and...

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

2020/04/29

Mat Kaplan recently hosted the first of a series of Explore Mars live and interactive events. NASA astrobiologist Penelope Boston and NASA Chief Scientist James Green joined him for a thrilling conversation about the search for life on the Red Planet, and what may happen if or when we find it. The comet may be a bust, but Bruce Betts tells us there’s still plenty to see in the current night sky. Mat and Bruce also talk about the first ever What’s Up Live!See the live Mars discussion and explore our

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73:16

The Royal Astronomical Society at 200

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

2020/04/22

“The object of THE ROYAL ASTRONOMICAL SOCIETY shall be the encouragement and promotion of Astronomy, Solar-System Sciences, Geophysics and closely related branches of science.” That’s what you’ll find on the website of the RAS. Its mission has changed little in the two centuries since it was founded by some of Britain’s leading scientific minds.Don’t miss the UK Poet Laureate’s poem in honor of the RAS at the end of this week’s episode. We also offer a tribute to the late Margaret Burbidge, one of

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1,353 results

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