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Planetary Radio Episodes

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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Dwarf Planet Ceres Thrills as a Dying Visitor Closes In

July 04, 2018

Ceres is the queen of the asteroid belt. Her first Earthly visitor is nearing its last days in spectacular style. Dawn Mission Director and Chief Engineer Marc Rayman returns with stunning images taken from just 35 kilometers or 22 miles above the dwarf planet, and a preview of the spacecraft’s last days.

Dawn: Ten Years of Exploration

October 11, 2017 • 59:03

Dawn Mission Director and Chief Engineer Marc Rayman helps us salute the ion-engine powered spacecraft that first orbited asteroid Vesta in the main asteroid belt and then moved to dwarf planet Ceres, revealing two fascinating worlds.

Art That Captures the Beauty and Science of Space

December 20, 2016 • 44:52

Marilynn Flynn, Simon Kregar and Rick Sternbach are masters of space art. They talk about how their work furthers science and captures the imagination.

Michel Mayor, Discoverer of the First Extrasolar World

April 05, 2016 • 39:41

Michel Mayor and his team rocked the astronomy world with their 1995 announcement, but this modest man says it was a discovery whose time had come.

Ashwin Vasavada, Leader of Scientists Roving Mars

March 29, 2016 • 38:02

The new Mars Science Laboratory Project Scientist is not new to the mission. Ashwin Vasavada has worked on the Curiosity rover since 2004.

NASA’s New Planetary Defense Office

February 02, 2016 • 50:35

Lindley Johnson has just been named NASA's first Planetary Defense Officer. He's joined on this week's PlanRad by astronomer Kelly Fast, the new manager of the Near Earth Object Observation Program.

Marc Rayman’s Dawn Mission Update

January 19, 2016 • 30:51

The Dawn Mission Chief Engineer Marc Rayman returns for another report on the ion-engine powered mission, now orbiting 240 miles above dwarf planet Ceres in the Asteroid Belt.

Planetary Radio Extra: Planetary Society Experts 2015 Review

January 05, 2016 • 61:40

Bruce Betts, Jason Davis, Casey Dreier and Emily Lakdawalla gather with Mat Kaplan for a fascinating and informative Planetary Radio Extra year-in-review roundtable discussion.

2015: A Great Year for Space Exploration

December 29, 2015 • 28:50

Our year-end review features the “best of 2015” lists from Jason Davis, Casey Dreier, Emily Lakdawalla and Bill Nye the Science Guy. What’s Up offers planets, a comet, and a nice prize package for the space trivia contest.

Solar System Revelations, and the World’s Biggest Telescope Threatened?

November 17, 2015 • 28:50

Emily Lakdawalla returns from the annual Division for Planetary Sciences meeting with big news from around the solar system. Then we talk with science journalist Traci Watson about the departure of the great Arecibo radio telescope’s Director and the funding challenge that could shut down the observatory.

A Conversation with Andy Weir of “The Martian”

October 27, 2015 • 1:07:51

“The Martian” has won universal acclaim from scientists, astronauts, NASA, science fiction fans, and people who thought they weren’t science fiction fans. Mat Kaplan talks with the author about his harrowing, uplifting, amazingly detailed and realistic tale.

The Launch of LightSail

May 26, 2015 • 28:50

This special edition takes you behind the scenes on May 20, 2015 as LightSail is lifted into orbit. You’ll hear the thrilling launch, meet key team members as they prepare for the big moment, and hear a special status report from Planetary Society CEO Bill Nye.

Spiraling Closer to Ceres With the Dawn Mission’s Marc Rayman

May 19, 2015 • 33:59

It’s the biggest dwarf planet between here and Pluto, and it has a new permanent resident. The Dawn spacecraft is orbiting Ceres in the asteroid belt, revealing it as never before. What are those bright spots anyway? We spend time with Dawn’s Chief Engineer and Director, Marc Rayman.

Big News From Little Worlds

March 24, 2015 • 28:50

Senior Editor Emily Lakdawalla has returned from the Lunar and Planetary Science Conference in Texas with the latest revelations about our solar system. She shares them in an extended report.

Virgin Galactic CEO George Whitesides on LauncherOne and the Return of SpaceShipTwo

March 10, 2015 • 28:50

6,000 job-seekers came to the new Long Beach, California home of Virgin Galactic’s LauncherOne rocket on a recent morning. We sit down with CEO George Whitesides for a conversation about this new effort and the return of SpaceShipTwo.

Jim Bell Welcomes “The Interstellar Age”

March 03, 2015 • 46:07

Planetary scientist and author Jim Bell has just written “The Interstellar Age—Inside the Forty-Year Voyager Mission.” He talks with Mat Kaplan about the magnificent grand tour of the outer solar system that is now headed toward the stars.

Year of the Icy Worlds

February 10, 2015 • 28:50

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.

Tales From a 4 Billion Year Old Piece of Mars...On Earth

February 03, 2015 • 28:50

Robina Shaheen and Mark Thiemens tell us how an ancient Mars meteorite has revealed much about the red planet. Mat holds a tiny fragment of the rock in their UC San Diego lab.

The Exciting Year Ahead on the Final Frontier

January 06, 2015 • 28:50

The Planetary Society’s experts look forward to a great year of firsts in the solar system and beyond.

Water on the Moon!

July 01, 2013 • 28:50

Amanda Hendrix looks for and studies water in our solar system, where it has been found in surprising locales. Earth's moon, for instance. She talks about Luna’s ice and the weathering of its ancient surface.

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