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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Chasing New Horizons to Pluto with Alan Stern and David Grinspoon

The New Horizons mission was a triumph, revealing Pluto as an utterly unique and beautiful world. But the mission first had to survive challenge after challenge, fighting to be developed, meeting a nearly impossible launch deadline, and then narrowly avoiding disaster when it was barely a week from its destination.

A Visitor From the Stars: ‘Oumuamua

The first confirmed interstellar visitor to our solar system is a needle-shaped asteroid given the Hawaiian name ‘Oumuamua. Karen Meech leads the team that is learning as much about it as possible before it leaves our neighborhood, never to return.

Countdown to Jupiter

Juno will enter Jupiter orbit on July 4th. Mat Kaplan talks with the mission’s Principal Investigator, Scott Bolton at the Jet Propulsion Laboratory. Bill Nye helps prepare us for this exciting encounter and the science that will follow.

At Space Symposium With the Leader of the European Space Agency

The annual Space Symposium in Colorado is a must-attend event for space leaders from around the world. Our coverage begins with United Arab Emirates Space Agency Director General Mohammed Nasser Al Ahbabi, and then moves to ESA Director General Jan Woerner and Chief Scientist Bernard Foing.

Planet 9 From Outer Space!

Mike Brown and Konstantin Batygin fully expect a new and undemotable ninth planet will be found in the outer reaches of the solar system. The Caltech researchers talk about their findings and much more.

Planetary Radio Extra: Planetary Society Experts 2015 Review

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.

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

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.

Found! Beagle 2 on Mars

The Beagle 2 Mars lander disappeared after it separated from the Mars Express orbiter on Christmas Day, 2003. Eleven years later, it has been found, partially-deployed on the Martian surface. Longtime Beagle 2 mission leader Mark Sims tells the story.

Dr. J and the World’s Biggest Telescope

Joe Liske, host of Hubblecast, is also the top scientist on the European Southern Observatory’s European Extremely Large Telescope (E-ELT), now under construction on a Chilean mountaintop. “Dr. J” tells us what this largest ever telescope will help us discover.

The SpaceShipTwo and Antares Disasters: Special Coverage With John Logsdon

It was a terrible, tragic week for commercial space development. Historian and space policy analyst John Logsdon helps up understand the greater meaning of the SpaceShipTwo and Antares disasters on this special edition of Planetary Radio, with additional thoughts from Bill Nye.

The Gemini Planet Imager: Worlds Made Visible

Principal Investigator and physicist Bruce Macintosh joins astronomer Franck Marchis to celebrate first light from the most powerful instrument for imaging exoplanets.

A 2014 Preview From Emily Lakdawalla

24 spacecraft are either busy exploring the solar system or speeding toward an exciting destination. The Planetary Society's Senior Editor takes us on a whirlwind advance tour.

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.

A Big Week for Space Science at the AGU and Beyond

The annual fall meeting of the American Geophysical Union revealed lots of science, some of it astounding. Emily Lakdawalla was there with Advocacy and Outreach Coordinator Casey Dreier, whose news was not quite as good.

Celebrating the Admiral of the Solar System

The life of explorer and teacher Dr. Bruce Murray was celebrated last November 10th at Caltech. This week we present a few excerpts from the tributes paid to the former JPL Director and co-founder of the Planetary Society.

It's Hot! Plutonium 238 is Back

Casey Dreier tells the winding tale of Plutonium 238, the radioactive isotope that is vital for exploration of the solar system. The US came dangerously close to exhausting its supply. Even with production restarted, there are major challenges facing explorers.

PLANETARY RADIO LIVE: LADEE Launches for Luna

Planetary Radio returned to the Crawford Family Forum for live coverage of the LADEE launch on September 6th.

Taikonauts on the Moon? A Conversation With Leonard David

Leonard David has been writing about space exploration for more than five decades. Now he has turned his attention to China’s ambitious plans.

Water on the Moon!

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.

Sun Rings: Music of the Spheres From the Kronos Quartet

The internationally renown string quartet talk about creating and performing Terry Riley's Sun Rings, that incorporates Don Gurnett's space sounds.

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