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For every week since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate or writer who provides a unique perspective on the quest for knowledge about our solar system and beyond. We also showcase regular features that raise your space IQ while they put a smile on your face.

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Space Policy Edition: Our Moral Obligation to Explore Space

May 01, 2020 • 1:11:17

Philosopher James Schwartz shares his thoughts about the ethics of space exploration, commercialization, and settlement.

Life on Mars: Joining the Quest with Penny Boston and Jim Green

April 29, 2020 • 55:34

The search for life on Mars is at a critical stage. What will come next if we find it?

The Next 10 Years: Continuing our Solar System Tour

April 01, 2020 • 1:18:25

Our look ahead at the near-future of solar system exploration continues with Mars, the giant outer worlds, and the smaller bodies that can be found throughout the neighborhood.

Building Our Future on Mars

March 18, 2020 • 57:32

Civil engineer Peter Carrato believes we know how to use what’s available on Mars to build the human structures that will be needed by the first explorers.

In the Clean Room With the Mars 2020 Rover

January 08, 2020 • 47:33

Host Mat Kaplan and Planetary Society solar system specialist Emily Lakdawalla go inside NASA’s Jet Propulsion Laboratory clean room to see the Mars 2020 rover.

What’s Next for Mars Exploration?

December 25, 2019 • 46:54

Planetary Society board member and Caltech/JPL research scientist Bethany Ehlmann discusses how the Mars 2020 mission will search for life on the Red Planet.

Space Policy Edition: The Biggest Policy Moments of the Decade (with Marcia Smith)

December 06, 2019 • 1L37:01

As the 2010s come to a close, Marcia Smith, the founder of Space Policy Online, rejoins the show to explore the most significant and impactful space policy decisions of the 2010s.

How Long Was Mars Wet?

October 23, 2019 • 28:50

The way minerals form in different Earth environments may hold the answer.

A Comet’s Legacy, and a Helicopter is Ready for Mars

September 04, 2019 • 61:11

First we return to JPL for an update on the Mars Helicopter that has just been attached to the belly of the 2020 Mars Rover. Then it’s across the pond for a review of the amazing science coming from the Rosetta mission that spent years exploring comet 67P/Churyumov-Gerasimenko. We wrap things up with another What’s Up view across the solar system and beyond.

NASA’s Red Planet Rick and Putting Humans on Mars

August 21, 2019 • 64:20

Rick Davis is the perfect person to co-lead NASA’s Mars Human Landing Sites Study. No one is more devoted to putting human bootprints on the Red Planet. He returns to Planetary Radio for this inspiring and informative conversation about our progress. Bruce Betts leads off What’s Up with another brief LightSail 2 update. The Planetary Society’s solar sailing cubesat continues to raise its orbit.

A Helicopter for Mars and a Major LightSail Announcement

July 31, 2019 • 37:40

It will be the first flying machine on another world. Mars Helicopter Project Manager MiMi Aung shares her plans. There’s big news about The Planetary Society’s LightSail 2!

Sharing a Passion for Mars at the Humans to Mars Summit

May 29, 2019 • 55:13

This year’s Humans to Mars Summit in Washington D.C., 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.

Bill Nye and Planetary Radio Live at Extreme STEAM

March 20, 2019 • 70:23

Planetary Radio Live goes on stage at the first ever Fairplex Extreme STEA2M Festival in Pomona, California. Host Mat Kaplan and Planetary Society CEO Bill Nye are joined by four young space scientists and engineers in front of hundreds of families.

A Fond Farewell to Spirit and Opportunity

February 20, 2019 • 68:44

The Mars Exploration Rover mission was declared complete on February 13, 2019. On the very next day, MER Project Manager John Callas and Deputy Project Scientist Abigail Fraeman came to Planetary Society headquarters for an extended and emotional conversation with Mat Kaplan and Emily Lakdawalla.

A Great Day for Space Explorers: The Landing of InSight

November 28, 2018 • 59:36

Join 1,000 anxious yet thrilled space fans at Caltech for our live InSight landing party. You’ll meet Mat Kaplan’s onstage experts and check in with Bill Nye and Emily Lakdawalla at the Jet Propulsion Lab.

We Know Where the 2020 Rover Will Look for Martian Life

November 21, 2018 • 42:34

NASA announced on November 19th that the multi-billion dollar 2020 Mars rover will land in Jezero crater, where it will begin the search for the signature of past life.

Opportunity, Phone Home!

September 12, 2018 • 33:30

The dust is settling on the Red Planet. Is the remaining Mars Exploration Rover about to rise and shine after three months of slumber? MER Project Manager John Callas returns with a realistic yet hopeful assessment.

Space Policy Edition: Did NASA Ace its Midterms? With Special Guest Louise Prockter

September 07, 2018 • 1:25:07

We talk with planetary scientist and Lunar and Planetary Institute Director Louise Prockter, who co-led creation of a new report evaluating the performance of NASA's planetary science division.

Space Policy Edition: Destination…Mars? Contradictions and Principles

August 03, 2018 • 60:02

The Senate just held a hearing on NASA's efforts to send humans to...Mars? A week later, the same committee advanced legislation to extend the life of the International Space Station to 2030, six years beyond the current end-date and two years beyond the current hardware safety ratings.

Diving Into That Lake on Mars

August 01, 2018 • 47:34

Our world was rocked by last week’s announcement of good radar evidence for a liquid water “lake” under the Red Planet’s south pole. Senior Editor Emily Lakdawalla introduces us to the story that is then taken up by two of host Mat Kaplan’s favorite Martians. The Goddard Space Flight Center’s James Garvin headed NASA’s Mars exploration program, while NASA Ames astrobiologist Chris McKay co-founded the Mars Underground more than 35 years ago.

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