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

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:&nbsp;<a href="https://www.planetary.org/planetary-radio/2024-pluto-kiss-and-capture">https://www.planetary.org/planetary-radio/2025-pluto-kiss-and-capture</a>

Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you inside the DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you inside the DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

Planetary Radio: Space Exploration, Astronomy and Science

Planetary Radio brings you the human adventure across our solar system and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye, the Science Guy, and Bruce Betts, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

Planetary Radio brings you the human adventure across our solar system and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye, the Science Guy, and Bruce Betts, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

How did Pluto meet its largest moon, Charon? Adeene Denton, a research scientist at the University of Arizona, suggests a "kiss-and-capture" may solve this mystery.

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

Two hot Jupiters presented at the 248th American Astronomical Society meeting push our understanding of exoplanet atmospheres to the extreme. Research Scientist Tiffany Kataria from NASA's Jet Propulsion Laboratory shares new JWST observations of HD80606 b, the "Roasted Planet,”a gas giant on one of the most eccentric orbits ever discovered. Assistant Professor Lisa Dang of the University of Waterloo joins to discuss CoRoT-2 b, a young, inflated hot Jupiter whose hottest point shows up in an unexpected location on the exoplanet, possibly because the planet hasn't fully tidally locked with its star yet. Then Chief Scientist Bruce Betts joins for What's Up to explore atmospheric super-rotation, winds that outrun the worlds they ride on.

Discover more at: https://www.planetary.org/planetary-radio/2026-hot-jupiters

Two hot Jupiters presented at the 248th American Astronomical Society meeting push our understanding of exoplanet atmospheres to the extreme. Research Scientist Tiffany Kataria from NASA's Jet Propulsion Laboratory shares new JWST observations of HD80606 b, the "Roasted Planet,&rdquo;a gas giant on one of the most eccentric orbits ever discovered. Assistant Professor Lisa Dang of the University of Waterloo joins to discuss CoRoT-2 b, a young, inflated hot Jupiter whose hottest point shows up in an unexpected location on the exoplanet, possibly because the planet hasn't fully tidally locked with its star yet. Then Chief Scientist Bruce Betts joins for What's Up to explore atmospheric super-rotation, winds that outrun the worlds they ride on.
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-hot-jupiters">https://www.planetary.org/planetary-radio/2026-hot-jupiters</a>

Research Scientist Tiffany Kataria of NASA JPL and Assistant Professor Lisa Dang of the University of Waterloo talk about two extreme hot Jupiters from the American Astronomical Society meeting.

Hot Jupiters: The ‘Roasted Planet’ and the wrong-way hotspot

It may be the best book subtitle we’ve encountered in the Planetary Society book club: “Particles, Poetry and the Cosmic Dream Boogie.” Theoretical physicist and black feminist science theorist Chanda Prescod-Weinstein has followed her acclaimed first book, “The Disordered Cosmos,” with this new, equally celebrated, deeply personal romp across the Universe, “The Edge of Space-Time”.  Swinging from quantum mechanics to hip-hop, and from galaxies to Alice in Wonderland, she guides us through the looking glass to what we know and would love to know about the Universe. It all but guaranteed a mind-bending conversation with host Mat Kaplan that begins with Chanda’s concern for the state of scientific research in the United States, and ends among the stars.  

Discover more at: https://www.planetary.org/planetary-radio/book-club-chandra-prescod-weinstein

It may be the best book subtitle we&rsquo;ve encountered in the Planetary Society book club: &ldquo;Particles, Poetry and the Cosmic Dream Boogie.&rdquo; Theoretical physicist and black feminist science theorist Chanda Prescod-Weinstein has followed her acclaimed first book, &ldquo;The Disordered Cosmos,&rdquo; with this new, equally celebrated, deeply personal romp across the Universe, &ldquo;The Edge of Space-Time&rdquo;.&nbsp; Swinging from quantum mechanics to hip-hop, and from galaxies to Alice in Wonderland, she guides us through the looking glass to what we know and would love to know about the Universe. It all but guaranteed a mind-bending conversation with host Mat Kaplan that begins with Chanda&rsquo;s concern for the state of scientific research in the United States, and ends among the stars.&nbsp;&nbsp;
Discover more at: <a href="https://www.planetary.org/planetary-radio/bce-chandra-prescod-weinstein">https://www.planetary.org/planetary-radio/book-club-chandra-prescod-weinstein</a>

Theoretical physicist Chanda Prescod-Weinstein visits the club for a mind-bending conversation about her brilliant, deeply personal exploration of the Cosmos.

Book Club Edition: “The Edge of Space-Time” by Chanda Prescod-Weinstein

“Baby's Guide to the Night Sky” introduces the youngest kids — down to newborns — to constellations and the wonders of the Cosmos. It comes from two people who've spent their lives chasing that same wonder in very different ways.

This week, we are joined by authors Sian Proctor and John Read. Sian Proctor is a geoscientist, artist, poet, and commercial space astronaut who served as pilot of Inspiration4 in 2021, becoming the first Black woman to serve as a mission pilot in space. John Read is an astronomer and science communicator who left a career in corporate finance after a single look through a telescope changed his life. He now hosts the YouTube channel LearnToStargaze and has authored several astronomy books, including “A Kid's Guide to the Night Sky.” We'll talk about how the two of them met, how they turned a lifetime of expertise into something a baby can enjoy, and why it's never too early to start looking up. 

Stick around after the interview for What’s Up with Bruce Betts, our chief scientist, to review the book and walk through some of the night sky objects it features. 

Discover more at: https://www.planetary.org/planetary-radio/2026-babys-guide-to-the-night-sky

&ldquo;Baby's Guide to the Night Sky&rdquo; introduces the youngest kids &mdash; down to newborns &mdash; to constellations and the wonders of the Cosmos. It comes from two people who've spent their lives chasing that same wonder in very different ways.
This week, we are joined by authors Sian Proctor and John Read. Sian Proctor is a geoscientist, artist, poet, and commercial space astronaut who served as pilot of Inspiration4 in 2021, becoming the first Black woman to serve as a mission pilot in space. John Read is an astronomer and science communicator who left a career in corporate finance after a single look through a telescope changed his life. He now hosts the YouTube channel LearnToStargaze and has authored several astronomy books, including &ldquo;A Kid's Guide to the Night Sky.&rdquo; We'll talk about how the two of them met, how they turned a lifetime of expertise into something a baby can enjoy, and why it's never too early to start looking up.&nbsp;
Stick around after the interview for What&rsquo;s Up with Bruce Betts, our chief scientist, to review the book and walk through some of the night sky objects it features.&nbsp;
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-babys-guide-to-the-night-sky">https://www.planetary.org/planetary-radio/2026-babys-guide-to-the-night-sky</a>

Commercial space astronaut Sian Proctor and astronomer John Read join Planetary Radio to discuss “Baby's Guide to the Night Sky,” their new book introducing the youngest children to constellations and the wonders of the Cosmos.

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

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