Kiss-and-capture: The dance of Pluto and Charon

Kiss-and-capture: The dance of Pluto and Charon

How did Pluto meet its largest moon, Charon? Many have speculated that Charon formed in an impact, but traditional models of planetary formation have struggled to explain many of the quirks of this system. This week, Adeene Denton, a research scientist at the University of Arizona, shares her team's new paper that suggests a "kiss-and-capture" may solve this mystery. Then Bruce Betts, The Planetary Society's chief scientist, discusses contact binaries in our Solar System and shares a new Random Space Fact in What's Up.

Discover more at: https://www.planetary.org/planetary-radio/2025-pluto-kiss-and-capture

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2025 NASA’s Innovative Advanced Concepts Symposium: Part 1 — Lunar glass and starshades

2025 NASA’s Innovative Advanced Concepts Symposium: Part 1 — Lunar glass and starshades

Each year, NASA’s Innovative Advanced Concepts program (NIAC) funds visionary ideas that could shape the future of space exploration. In this first of two episodes from the 2025 NIAC Symposium in Phil...

15 Loka 202553min

A Day of Action to save NASA science

A Day of Action to save NASA science

On October 6, 2025, hundreds of space advocates from across the United States joined The Planetary Society and 20 partner organizations on Capitol Hill to deliver one clear message: protect NASA’s sci...

8 Loka 20251h

Space Policy Edition: China’s growing space science ambitions

Space Policy Edition: China’s growing space science ambitions

If the United States is indeed in a space race with China, then we cannot abandon space science. That’s the claim made by Maxwell Zhu and The Planetary Society’s chief of space policy, Casey Dreier, i...

3 Loka 202548min

Perseverance finds potential biosignatures in Jezero Crater

Perseverance finds potential biosignatures in Jezero Crater

NASA’s Perseverance rover has made one of its most intriguing discoveries yet in Jezero Crater. A rock sample called Sapphire Canyon, drilled from the Bright Angel formation, contains unusual chemical...

1 Loka 20251h

Bill Nye: A star in Hollywood, a voice for NASA

Bill Nye: A star in Hollywood, a voice for NASA

Bill Nye, CEO of The Planetary Society, has officially joined the Hollywood Walk of Fame. In this episode, we speak with Bill about what this rare honor means to him and to science communication. Then...

24 Syys 202556min

Book Club Edition: Cosmos Award–winning author Dava Sobel

Book Club Edition: Cosmos Award–winning author Dava Sobel

Only six people have received The Planetary Society’s Cosmos Award for Outstanding Public Presentation of Science. We were honored to present it to author and historian Dava Sobel in May of 2025. She ...

19 Syys 202550min

A cosmic travel guide: 111 Places in Space That You Must Not Miss

A cosmic travel guide: 111 Places in Space That You Must Not Miss

Pack your cosmic suitcase. This week on Planetary Radio, host Sarah Al-Ahmed is joined by Mark McCaughrean, astronomer, science communicator, and former Senior Advisor for Science & Exploration at the...

17 Syys 20251h 7min

International Observe the Moon Night 2025

International Observe the Moon Night 2025

This week on Planetary Radio, we look forward to International Observe the Moon Night on October 4, 2025. Host Sarah Al-Ahmed speaks with Staci Horvath, outreach coordinator for NASA’s Solar System Ex...

10 Syys 202559min

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