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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Artemis II and III: The science that brings us back to the Moon

Artemis II and III: The science that brings us back to the Moon

Humans are preparing to return to the Moon. On this episode of Planetary Radio, host Sarah Al-Ahmed is joined by Kelsey Young and Noah Petro, two of the scientists helping turn humanity’s return to th...

28 Tammi 1h 4min

NASA science saved: Inside the 2026 budget victory

NASA science saved: Inside the 2026 budget victory

After months of uncertainty, NASA science has been spared from the largest proposed budget cuts in the agency’s history. In this episode of Planetary Radio, host Sarah Al-Ahmed unpacks how Congress mo...

21 Tammi 1h 1min

Book Club Edition: The Little Book of Aliens by Adam Frank

Book Club Edition: The Little Book of Aliens by Adam Frank

Famed astrophysicist and science communicator Adam Frank shares his sense of wonder and humor in a live conversation about his excellent new book, “The Little Book of Aliens.” Join Adam and host Mat K...

16 Tammi 44min

IMAP and the shape of the heliosphere

IMAP and the shape of the heliosphere

Our Solar System is wrapped in a vast, invisible bubble created by the Sun, a protective region that shields Earth and the planets from much of the radiation that fills our galaxy. But until recently,...

14 Tammi 56min

Voyager and the heliopause: Exploring where the Sun gives way to the stars

Voyager and the heliopause: Exploring where the Sun gives way to the stars

What does it really mean to enter interstellar space, and what have we learned since humanity first crossed the invisible boundary between our Sun and the stars? In this episode of Planetary Radio, we...

7 Tammi 58min

Space Policy Edition: Change for the Sake of Disruption at NASA

Space Policy Edition: Change for the Sake of Disruption at NASA

Marcia Smith, the founder and editor of Space Policy Online, joins the show and revisits a conversation we had one year ago, recorded just weeks before the second Trump administration took office. Tha...

2 Tammi 1h 11min

Looking back: Space exploration in 2025

Looking back: Space exploration in 2025

As 2025 comes to a close, Planetary Radio looks back on a year that reshaped space exploration, through stunning discoveries, major milestones, unexpected challenges, and the people who carried scienc...

31 Joulu 20251h 8min

Looking back: Space policy and advocacy in 2025

Looking back: Space policy and advocacy in 2025

2025 was one of the most consequential years for space policy in modern U.S. history. In this special year-in-review episode, Planetary Radio takes a deep dive into what happened behind the scenes in ...

24 Joulu 202557min

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