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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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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.

Mighty Jupiter Revealed

January 29, 2020 • 31:53

Juno mission principal investigator Scott Bolton provides an enticing taste of the Jupiter orbiter’s mind-bending discoveries.

The Coming Descent to Asteroid Bennu

January 22, 2020 • 1:02:35

OSIRIS-REx mission leader Dante Lauretta takes us to mysterious asteroid Bennu where a first sample collection site has been selected.

The MILO Institute: Opening the Solar System for Exploration by All

January 15, 2020 • 59:45

Planetary Scientist Jim Bell and space entrepreneur Lon Levin are founders of a new non-profit that aims to make robotic space exploration much more achievable by institutions around the world.

Space Policy Edition: Houston, We Have a Space Force (with Brian Weeden)

January 10, 2020 • 1:08:10

Legislation signed by President Trump in December formally established the 6th branch of the U.S. armed services, the first such expansion in 72 years. What exactly will the new Space Force do?

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.

Planetary Society All-Stars Look Back at 2019 and Ahead to 2020

January 01, 2020 • 1:17:08

Planetary Society experts Jason Davis, Casey Dreier and Emily Lakdawalla join host Mat Kaplan to recap the big space moments of 2019 and explore what's ahead in 2020.

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.

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