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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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Crew Dragon Deep Dive with Astronaut Garrett Reisman

May 20, 2020 • 43:47

Former astronaut Garrett Reisman helped lead development of the SpaceX Crew Dragon spacecraft that is about to carry astronauts to the International Space Station.

Looking for Life in Alien Oceans

May 13, 2020 • 53:00

JPL scientist Kevin Hand is endlessly fascinated by the possibility of life in the hidden oceans of the outer solar system’s moons, and now he has written a great book about the quest to discover it.

The Crew Dragon Countdown Begins With Former NASA Deputy Administrator Lori Garver

May 06, 2020 • 58:02

American astronauts are about to fly from Florida to the International Space Station for the first time in nine years, thanks to the commercial space development initiative advocated for years by Lori Garver.

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 Royal Astronomical Society at 200

April 22, 2020 • 1:13:16

Celebrating the 200th anniversary of the Royal Astronomical Society and the life of the late astronomer Margaret Burbidge.

NASA Administrator James Bridenstine Returns

April 15, 2020 • 49:34

The U.S. space agency’s leader describes how NASA is responding to the pandemic crisis as it works to keep projects and missions on track.

The Slime Mold and the Universe

April 08, 2020 • 50:58

One of Earth’s lowliest creatures has inspired and guided a team of scientists toward an improved model for the distribution of galaxies and dark matter across the cosmos.

Space Policy Edition: Our Equinox Space Policy Briefing

April 03, 2020

Join The Planetary Society’s policy team, including Bill Nye, for highlights of a members-only live briefing that shared our analysis of how the coronavirus pandemic may affect space exploration.

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.

The Next 10 Years of Planetary Exploration

March 25, 2020 • 1:09:04

Six scientists give us a preview of where planetary science may be taken in the next 10 years by a new NASA decadal survey.

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.

The Return of Cosmos and Ann Druyan

March 11, 2020 • 47:02

Cosmos has returned under the steady hand of Ann Druyan. We’ll talk with her about the third season of the television series and her companion book.

Space Policy Edition: NASA's 2021 Budget Request Brings Billions

March 06, 2020 • 1:06:41

NASA’s fiscal year 2021 budget request contains lots of good news along with a few disappointments. How will Congress weigh in?

Astronomers Without Borders

March 04, 2020 • 58:48

The founder of Astronomers Without Borders brings the organization’s leader in Nigeria to the Planetary Radio microphones.

The Search for 100 Earths

February 26, 2020 • 45:17

The search for worlds like our own is underway, but the challenges are enormous according to astronomers Debra Fischer and Joe Llama.

Life=Matter+Information: Paul Davies and the Demon in the Machine

February 19, 2020 • 1:10:27

Physicist and author Paul Davies returns to talk about his new book that explores the defining role information plays in life on Earth and perhaps elsewhere.

Another Goldilocks World and the Space Telescope That Discovered It

February 12, 2020 • 52:44

Another near Earth-sized planet has been found in the habitable zone around a distant star, discovered by a powerful space telescope named TESS.

Space Policy Edition: Is the Moon a Stepping-Stone or a Cornerstone for Mars? (with Laura Seward Forczyk)

February 07, 2020 • 1:13:28

Casey and his guest discuss a bill working its way through the US House of Representatives that challenges the Artemis plan adopted by NASA for human exploration of the Moon and Mars.

A Great Space Observatory Goes Dark: The Legacy of Spitzer

February 05, 2020 • 1:24:58

Leaders of the just-ended Spitzer Space Telescope mission help us celebrate sixteen years of discoveries about our solar system, exoplanets and galaxies nearly as old as the universe itself.

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