Planetary Radio: Space Exploration, Astronomy and Science
von The Planetary Society
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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.
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Space Policy Edition: Whose JPL is it? A historian on the lab’s 90-year search for itself
Ninety years ago this Halloween, a group of Caltech graduate students hauled a small rocket motor into the Arroyo Seco near Pasadena and tried to fire it up. It didn’t go as planned, but that moment became the unofficial birthday of NASA’s
The night the Universe got bigger: An event to honor Hubble’s discovery
On the night of Oct. 5, 1923, Edwin Hubble spotted a variable star in Andromeda from Mt. Wilson Observatory above Pasadena, California, proving that our galaxy is just one of countless others in the Universe. Now, California Rep. Judy Chu,
How Perseverance drove itself into the record books
NASA’s Perseverance rover has driven farther than any other vehicle on another world. On Oct. 11, 2026, its odometer reached 45.22 kilometers (28.10 miles), passing the record Opportunity spent about 15 years setting. Perseverance did it in
Meet the Winners of The Planetary Society’s 2026 STEP Grants
Every two years, The Planetary Society funds research through our STEP Grants (Science and Technology Empowered by the Public). This year, all three winning projects focus on small bodies in our Solar System, like asteroids and trans-Neptun
Book Club Edition: Dinner With an Astronaut by Leroy Chiao
Leroy Chiao was one of the youngest astronauts ever selected. He would spend 229 days in low-Earth orbit, command the International Space Station, and perform three spacewalks. His book, “Dinner with an Astronaut,” chronicles his journey fr
From the Mojave to Phobos: PlanetVac rides with MMX
Japan’s Martian Moons eXploration mission, MMX, is about to set out for Phobos and Deimos, the two small moons of Mars. If all goes well, it will bring the first-ever sample from the Martian system back to Earth. Asa Stahl, public outreach
Space Policy Edition: What does “science as a service” really mean?
Can you buy science the way you buy a rocket launch? NASA is exploring the idea of “science as a service,” asking industry how commercial companies could provide scientific data and capabilities for Earth science, space weather, and astroph
2026 NASA's Innovative Advanced Concepts Symposium: Part 2 — Solar sails and breathing beyond Earth
In this second of two episodes from the 2026 NASA Innovative Advanced Concepts (NIAC) Symposium at Wichita State University, Sarah Al-Ahmed talks with researchers developing the propulsion and life support technologies that could open up ne
2026 NASA's Innovative Advanced Concepts Symposium: Part 1 — Nuclear sensors and cave explorers
Some of the most exciting science in our Solar System is hidden in places we've never been able to reach. In this episode, Sarah Al-Ahmed shares three conversations from the 2026 NASA Innovative Advanced Concepts (NIAC)Symposium at Wichita
Hayabusa2 flies by asteroid Torifune
JAXA's Hayabusa2 flew within 400 meters (1,300 feet) of asteroid Torifune on July 5 and confirmed that it's a contact binary, two lobes stuck together. Paul Abell, NASA's Chief Scientist for Small Body Exploration at Johnson Space Center, w
Book Club Edition: Alien Oceans by Kevin Hand
Where are we most likely to find evidence of life, past or living, in the Solar System? Planetary scientist and author Kevin Hand looks to warm, salty ocean depths beneath protective layers of ice on worlds such as Europa and Enceladus. His
Star Trek at 60: What Vulcans and Klingons can teach us about being human (Part 2)
This is part two of our Star Trek 60th anniversary series. Robert Picardo, the Emergency Medical Hologram on Star Trek: Voyager and a member of The Planetary Society's board of directors, reads a vintage letter from Star Trek creator Gene R
Star Trek at 60: What do we value the most? (Part 1)
Star Trek turned 60 on Sept. 8, 2026, and to celebrate, we're kicking off a special two-part series exploring the franchise's deep and lasting connection to real-world space exploration. In Part 1, Robert Picardo, the Emergency Medical Holo
Space Policy Edition: The Long Space Age with Alex MacDonald
We tend to think of private space exploration as a recent phenomenon. But as Alex MacDonald, former Chief Economist at NASA, argues in his book "The Long Space Age," privately funded space exploration has deep roots in American history, str
World Space Week and farewell to Swift
Dennis Stone, president and co-founder of the World Space Week Association, takes us behind the scenes of the largest annual space event on Earth. From its origins as a volunteer effort in Houston to a UN-declared celebration reaching 50,00
The Nancy Grace Roman Space Telescope is ready to launch
After decades of development, the Nancy Grace Roman Space Telescope is preparing to launch. Once in orbit, Roman will conduct the widest surveys of the universe ever attempted, probing the nature of dark energy, discovering thousands of new
Book Club Edition: Becoming Martian by Scott Solomon
Will we change or terraform Mars to better suit humans? Or are we more likely to change ourselves to better fit the red planet? How far can evolution take us in these new and exotic environments? These and many other fascinating questions a
The SpaceX Falcon 9 that crashed into the Moon
A SpaceX Falcon 9 upper stage slammed into the moon on August 5 after spending over a year and a half drifting through the Earth-Moon system. Jared Head, museum facilitator at Columbia Memorial Space Center, producer at TMRO, and co-host of
Total solar eclipse 2026: Astrophotography and birdsong
On August 12th, 2026, the Moon’s shadow will sweep across Iceland, Greenland, and Spain, bringing the first total solar eclipse visible from Europe since 1999. And because this eclipse happens near sunset, it promises to be one of the most
Space Policy Edition: “Science: A New Golden Age” - Reimagining U.S. science policy
The White House's Office of Science and Technology Policy recently released "Science: A New Golden Age", a sweeping report that calls for a fundamental reimagining of how the United States funds and conducts science. Explicitly modeled on V
LHS 1140b: The first atmosphere detected on a rocky habitable-zone exoplanet
For the first time, scientists have confirmed an atmosphere on a rocky exoplanet in the habitable zone of another star. Sarah Al-Ahmed is joined by Collin Cherubim, NASA Hubble Fellow at the University of Chicago, to discuss his team's dete
TERP RAPTOR: A student-built mission to asteroid Apophis
On Friday, April 13, 2029, asteroid Apophis will pass closer to Earth than our geostationary satellites. While NASA, ESA, and JAXA are all sending missions, a team of students at the University of Maryland is building their own spacecraft t
Hot Jupiters: The ‘Roasted Planet’ and the wrong-way hotspot
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 observati
Book Club Edition: “The Edge of Space-Time” by Chanda Prescod-Weinstein
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 accl
Sian Proctor and John Read on teaching babies to love the Cosmos
“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,
Small Town Universe: Inside Green Bank's Radio Quiet Zone
Green Bank, West Virginia is home to the world's largest fully steerable radio telescope. It's also the only town in the U.S. where cell phones and Wi-Fi are banned, so the telescope can listen for faint signals from across the Universe und
Space Policy Edition: What's going on with commercial space stations?
NASA's plan for what comes after the International Space Station (ISS) has been anything but stable. Since 2019, the agency's commercial space station strategy has shifted from free-flying vendor-operated stations to a government-owned modu
Rosalind Franklin and the search for life on Mars
After more than two decades, the European Space Agency's Rosalind Franklin rover finally has a path to the launchpad. This week, ExoMars Project Scientist Jorge Vago joins Planetary Radio to talk about what makes this mission like nothing w
Tianwen-2: China closes in on Kamoʻoalewa
China’s Tianwen-2 spacecraft has successfully arrived at Kamoʻoalewa—a tiny, enigmatic "quasi-satellite" that dances along with Earth on its trek around the Sun. A fascinating scientific debate is heating up over this object's true identity
Book Club Edition: “To Be Taught, If Fortunate” with Becky Chambers
This outstanding novella, “To Be Taught, If Fortunate” by award-winning science fiction author Becky Chambers, is a passionate argument for the human exploration of space and the wonders we will find there. Kirkus Reviews calls it, “An extr
