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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A Symphony for 7 Moons

Composer Amanda Lee Falkenberg is joined by Cassini project scientist Linda Spilker and retired astronaut Nicole Stott as she shares excerpts from The Moons Symphony.

Astronaut Stephanie Wilson Might Walk on the Moon

18 astronauts on the Artemis Team have a shot at walking on the Moon, and Stephanie Wilson is one of them.

Beyond Earth’s Edge: A Celebrity Space Poetry Jam!

Creators of an outstanding new collection of poems about spaceflight and exploration join Mat Kaplan to talk about the book as Bill Nye and other notables read selections.

The News From Saturn-With Linda Spilker

It has been many months since the great Cassini spacecraft plunged into Saturn’s atmosphere and fiery death. Yet the mission lives on as the reams of data and images reveal much more of this beautiful world, its rings and its moons.

Back to Saturn for Brand New Cassini Science

Our most frequent guest returns with exciting, just-published research enabled by the 20-year mission’s enormous success. Linda Spilker has served as Cassini Project Scientist for 8 years, and was Deputy Project Scientist for the previous 13. You’ll also get the chance to win Bruce Betts’ great new intro to astronomy book in this week’s space trivia contest.

Celebrating Cassini…Live!

More than 1,100 fans of the just-completed 20-year mission to Saturn joined us for a live tribute.

Long Live Cassini!

Join us at JPL and Caltech on the bittersweet morning the Cassini spacecraft plunged into Saturn.

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.

The Final Countdown at Saturn

Planetary Radio’s most frequent guest, Project Scientist Linda Spilker, returns with another update on the Cassini mission that is approaching its grand finale.

Cassini at Saturn: The Final Year

The great Cassini spacecraft has a year to go before it plunges into the ringed planet. Project Scientist Linda Spilker returns with more amazing mission science.

Planetary Radio Live: All These Worlds…

Our live conversation about “Planet 9” and the amazing diversity of our solar system, featuring Konstantin Batygin and Mike Brown of Caltech, Senior Editor Emily Lakdawalla, Bill Nye the Science Guy and Cassini Project Scientist Linda Spilker.

Exploring Saturn With Cassini

Cassini Mission Project Scientist Linda Spilker returns with the latest discoveries at the beautiful ringed planet, its moons and its rings.

Planetary Radio Live at the New Horizons Pluto Encounter

Join our live audience for highlights of an amazing evening, featuring Jim Bell, Bruce Betts, Mike Brown, Emily Lakdawalla, Linda Spilker, and Bill Nye the Science Guy.

Cassini Update AND LightSail Spreads its Wings!

Cassini Project Scientist Linda Spilker, returns with another update on the magnificent mission at Saturn. You’ll also hear Bill Nye and the moment when LightSail began to deploy its solar sail.

Year of the Icy Worlds

We’ll visit the Jet Propulsion Lab on its Icy Worlds Day to learn more about spacecraft exploring Ceres, Enceladus and Europa from leaders of these missions.

Cassini Mission Update From Project Scientist Linda Spilker

Cassini is safe! Project scientist Linda Spilker returns with a regular update on Saturn, its moons and rings not long after learning that the mission is funded through its 2017 plunge into the planet.

A Starlight Festival Cassini Mission Update

Cassini Project Scientist Linda Spilker joins us at the first Starlight Festival in Big Bear Lake, California, and festival MC Andre Bormanis makes a bonus appearance on the show.

Saturn Update From Cassini Project Scientist Linda Spilker

We pay another visit to the queen of planets with Cassini Mission Project Scientist Linda Spilker. She always brings us fascinating news from Saturn, its moons and rings.

Cassini Project Scientist Linda Spilker With a Saturn Mission Update

Planetary Radio's most frequent guest returns with the latest news from the great ringed world, its moons, and its rings.

A Cassini Saturn Update from Linda Spilker

A Cassini Saturn Update From Linda Spilker

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