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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Meet the Planetary Society’s Newest Asteroid Hunters

We talk with two of our 2019 Shoemaker NEO Grant winners, who received funding to help find, track, and characterize potentially hazardous asteroids.

A Spirited Conversation with Carolyn Porco

A fun conversation with the leader of the Cassini imaging team, and an audio tour of the transit of Mercury with astronomer Jay Pasachoff.

Apollo 11 and the Woman Who Helped Get It Home

Poppy Northcutt was a pioneer—the first woman to work as an engineer in Apollo Mission Control. The program she helped to create got the astronauts back to Earth. Fifty years later, she sits down with Mat Kaplan for a look back.

LightSail Takes Flight!

A giant SpaceX Falcon Heavy lifted off in the early hours of June 25th. One week later, the LightSail 2 solar sail was released to begin its epic mission. You’ll join the thrilling launch, meet LightSail team members and leaders of other missions, and get a solar sail update in this very special episode.

Flight by Light: A LightSail 2 Mission Preview

The day is almost here. With the launch of a Falcon Heavy rocket, The Planetary Society will begin its mission to prove that a tiny, orbiting spacecraft can be propelled by the light of the Sun.

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.

Dunes, Walnut Shells, Alien Impostors and Other Worlds: A Visit with Sarah Hörst

A very special, extended conversation with Johns Hopkins University planetary scientist Sarah Hörst is capped by a tour of her fascinating lab. That’s where Sarah and her team simulate decidedly un-Earthlike atmospheres and more. Emily Lakdawalla has returned from this year’s Lunar and Planetary Science Conference with news from around the solar system. Caffeine! It’s on Saturn’s moon Titan AND in the espresso made on the International Space Station! More about the latter in What’s Up.

An Israeli Lander Launches Toward the Moon

Non-profit SpaceIL’s Beresheet is on its way to the Moon. Only China, the Soviet Union and the United States have safely landed there before. Host Mat Kaplan talks with SpaceIL Senior Systems Engineer Yoav Landsman, while MaryLiz Bender hears from a team member who attended the launch.

At the Space Settlement Summit With Former NASA Administrator Charlie Bolden

He led NASA for eight years, but not till he had flown on four Space Shuttle missions and enjoyed a long military career. Charlie Bolden talks with Mat about his time at the space agency and where we’re headed on the final frontier.

Space, Rockets, and a Senatorial Encounter in Huntsville, Alabama

Host Mat Kaplan begins a two-episode visit to Huntsville and the Marshall Space Flight Center, recorded this week at the US Space and Rocket Center with astronaut Don Thomas, 94-year-old Apollo engineer Alex McCool, and Alabama Senator Doug Jones.

Pluto Occults! Join Us on the Mountain

Pluto passed in front of a star on the evening of August 14. Mat Kaplan joined pro and amateur astronomers on a mountain to observe this rare event. It may reveal more about the dwarf planet’s tenuous atmosphere and other properties.

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.

A Conversation with Freeman Dyson

There’s so much more to Freeman Dyson than the Dyson Sphere. The mathematician, physicist, futurist and author is one of the greatest and most original minds of our era.

Stephen Hawking: Spaceflight Pioneer!

He is known for his breakthrough physics and popularizing of science, but Dr. Hawking also wanted to fly in space. Erik Viirre led the medical team that helped Stephen experience weightlessness.

Visiting Worlds Fantastic with Bonnie Buratti

Veteran Jet Propulsion Lab planetary scientist Bonnie Buratti talks with Mat about the wonder of our solar neighborhood that she explores in

The Eagle Has Landed: Remembering Neil Armstrong

We celebrate the 47th anniversary of the first moon landing with the reprise of a conversation with author and NBC space reporter Jay Barbree about his trusted friend Neil Armstrong.

Fighting for Space: Former NASA Deputy Administrator Lori Garver

She has spent most of her life working toward a bright future for humanity in space, and Lori Garver has lost none of her passion. She visited the Planetary Society for a wide-ranging conversation with Mat Kaplan.

Leaving Behind a Life on Mars—Former Curiosity Project Scientist John Grotzinger

The Mars Science Laboratory rover has accomplished its primary goals on the Red Planet, and John Grotzinger has left his central role to become Chair of the Division of Geological and Planetary Sciences at the California Institute of Technology. He shares his thoughts about the ongoing mission and much more.

Jay Barbree on “Neil Armstrong: A Life of Flight”

In his 55 years as NBC’s space correspondent, Jay Barbree has won the respect and friendship of many astronauts. Neil Armstrong stands above them all. Now Jay has created this very personal chronicle about his friend, with help from Neil and many of the other pioneering spacefarers.

10 Years A Roving: A.J.S. Rayl on the Mars Exploration Rovers

What a long, wonderful trip it has been for Spirit and Opportunity, the Mars Exploration Rovers. Planetary Society reporter A.J.S. Rayl has been writing about their adventure every month for ten years. She looks back on this week’s show.

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