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. The full show archive is available for free.

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Another Goldilocks World and the Space Telescope That Discovered It

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

Starchaser: Extraordinary Astronomer Jay Pasachoff

Jay Pasachoff visits Planetary Society headquarters for a conversation about the latest edition of his and Alex Filippenko’s monumental textbook The Cosmos.

Giving Mysterious Venus the Love (and Science) She Deserves

We have so much to learn about Venus, says JPL scientist Sue Smrekar. What we learn will help us understand our own world and Mars.

Planetary Radio Live on the Eve of the Eclipse

With hours to go before the Great American Eclipse, nine outstanding guests joined host Mat Kaplan for Planetary Radio Live in front of 1,100 rowdy eclipse and space science fans.

Cassini Project Scientist Linda Spilker’s Last Appearance Before the Grand Finale

It’s the Grandest Finale. The spectacular Cassini mission’s exploration of Saturn will end on September 15th when the spacecraft plunges into the planet. Cassini Project Scientist Linda Spilker is back with one last mission update.

Ed Stone and Forty Years of Voyager in Space

It is most space fans’ favorite planetary science mission, and with good reason. We visit with the man who has been in charge of Voyager mission science for more than four decades.

Dark Energy Attracts? Astrophysicists Jason Rhodes and Alina Kiessling

JPL astrophysicists Alina Kiessling and Jason Rhodes were brought together by their fascination over the mystery of dark energy. They talk with Planetary Radio about their research and the many missions they are contributing to, including WFIRST, a unique new space telescope.

An Eye on the Sun (In the Middle of a Lake)

The world’s most powerful solar telescope has just been renamed for the man responsible for its creation. We’ll meet astrophysicist and helioseismologist Phil Goode, and we’ll enjoy a tour of the Goode Solar Telescope.

20 Years on Mars with Matt Golombek

When the Pathfinder lander reached Mars 20 years ago it began a Martian renaissance that has never paused. JPL scientist Matt Golombek was the mission’s Project Scientist. He looks back and to the future of our explorations at the Red Planet.

Thomas Edison, Eclipse Chaser!

Former NPR science reporter David Baron discusses the stories of men and women who made their way across the American West to view and document the total solar eclipse of 1878.

Be There! The Great American Eclipse

Our ongoing coverage of preparation for the Great American Eclipse takes us to Southern Illinois University Carbondale where a huge celebration is planned.

The Great American Eclipse—Be Part of It!

It’s coming! Will you be in the path of totality? Astronomers Without Borders President Mike Simmons says be there if you can.

Running Before the Sun: Astronomer Jay Pasachoff

No one is more excited about eclipses than famed solar astronomer and author Jay Pasachoff. He looks forward to the total solar eclipse in August of 2017.

Could the Soviet Union Have Won the Space Race?

Space historian and policy expert John Logsdon joins Mat Kaplan for a fascinating conversation about how the US could have lost the race to the moon.