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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Looking back on Voyager’s 45th Anniversary

Planetary Radio’s creator Mat Kaplan guest hosts for this look back at the Jet Propulsion Lab’s celebration of the 45th anniversary of the Voyager mission.

Ann Druyan wishes you a happy Sagan Day

Celebrate Carl Sagan’s birthday with his longtime collaborator and life partner Ann Druyan.

The Voyager Mission: A 45th Anniversary Celebration

It’s a party for Voyager and the team of scientists, engineers and others who have followed it across our Solar System. Then we’ll visit with Ann Druyan, creative director for the Voyager Golden Record.

The Return of Cosmos and Ann Druyan

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.

To Mars! With National Geographic

The National Geographic Channel’s “Mars” miniseries has begun. Mat Kaplan attended a kickoff for the ambitious docudrama last summer. You’ll hear from series technical advisor Bobby Braun, author of “The Martian” Andy Weir, Cosmos creator Ann Druyan and more.

Ann Druyan and the Breakthrough SETI Initiatives

The Breakthrough Initiatives will pump $100 million into the Search for Extraterrestrial Intelligence in the next 10 years, vastly expanding humanity’s quest to learn if it has company in the universe. Among the leaders of this brave new project is Cosmos creator Ann Druyan. Join us for a special, extended conversation with Ann.

Celebrating 35 Years of the Voyager Mission

Voyagers 1 and 2 just reached 35 years of travel in space. What a great reason to celebrate! Join Voyager Project Scientist Ed Stone, Ann Druyan, Emily Lakdawalla and Robert Picardo in this special live edition of our show. Bill Nye reports on a separate celebration in London and on the International Space Station, and Bruce Betts is back in fine form with Mat Kaplan for this week’s What’s Up.

Celebrating Carl Sagan and a New Solar Sail With Ann Druyan

Solar sailing returns with LightSail, announced on the 75th anniversary of Carl Sagan's birth.

Ann Druyan on New Honors for Carl Sagan

Longtime partner Ann Druyan is proud of NASA's new Carl Sagan Fellowships. Bill Nye has a tribute for his old professor.

A Special Reprise: The Planetary Society's 25th Anniversary Gala

A Special Reprise: The Planetary Society's 25th Anniversary Gala

Special Edition: Planetary Society's 25th Anniversary Gala

The Planetary Society celebrates 25 years with 300 close friends, including Ray Bradbury and Bill Nye. Also, a new What's Up space trivia contest.

Era of Solar Sailing Begins

Era of Solar Sailing Begins

Solar Sail Ready for Liftoff

Solar Sail Ready for Liftoff