Hayabusa2 flies by asteroid Torifune

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-Neptunian objects. Each one tackles a different piece of the same challenge: As we discover more and more small bodies, how do we characterize them, and how do we make sure the whole community can build on what we learn? Nick Moskovitz and his team at Lowell Observatory, including instrumentation lead Ryan Hamilton and instrument designer Katie Breeland-Newcomb, are building a low-cost, replicable polarimeter to break through the size ambiguity that makes it hard to tell a small, bright asteroid from a large, dark one. Miguel Alarcón of Light Bridges is expanding AsteroidDB, a database of over 15 million photometric measurements, so researchers and citizen scientists can pool their data. And Mike Kretlow of the German Center for Astrophysics is scaling up CORA, his stellar occultation prediction and archive platform, to handle the tens of thousands of new discoveries expected from the Vera Rubin Observatory. Plus, Bruce Betts joins for What’s Up and to look at the origins of the STEP Grant program.  Discover more at: https://www.planetary.org/planetary-radio/2026-step-grant-winnersSee omnystudio.com/listener for privacy information.

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 from Chinese American kid born in Milwaukee, Wisconsin to the literal heights of space achievement. Leroy also shares his thoughts about topics as diverse as engineering, Chinese food, and UFOs/UAPs in this entertaining conversation with The Planetary Society’s Mat Kaplan. Discover more at: https://www.planetary.org/planetary-radio/book-club-leroy-chiaoSee omnystudio.com/listener for privacy information.

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 astronomer at The Planetary Society, explains why these strange little moons are still such a mystery and what a piece of Phobos could reveal. Then Kris Zacny, vice president and senior research scientist at Honeybee Robotics, tells the story of PlanetVac, a sampler that Planetary Society members helped get off the ground more than a decade ago. From its first tests in a vacuum chamber to the surface of the Moon aboard Firefly Aerospace’s Blue Ghost lander, PlanetVac has come a long way, and its descendant is now headed for Phobos. Plus, Bruce Betts, chief scientist at The Planetary Society, joins us in What’s Up. Discover more at: https://www.planetary.org/planetary-radio/2026-mmx-planetvacSee omnystudio.com/listener for privacy information.

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 astrophysics. But the concept isn’t new. It’s the latest chapter in a four-decade effort to commercialize space science that stretches back to the brief, troubled privatization of Landsat in the 1980s. Casey Dreier is joined by Jack Kiraly, chief of advocacy for The Planetary Society, and Britney Schmidt, planetary scientist, astrobiologist, and Planetary Society board member, to unpack what commercial science services can and can’t deliver.  Discover more at: https://www.planetary.org/planetary-radio/science-as-a-serviceSee omnystudio.com/listener for privacy information.

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 new frontiers in deep space exploration. First, Artur Davoyan, associate professor at the University of California, Los Angeles, discusses Coilable Stacked Solar Sails, a new sail architecture that could enable fast missions to the outer planets and interstellar space. Then, James Bickford of Charles Stark Draper Laboratory introduces TFINER, the Thin Film Isotope Nuclear Engine Rocket, a project that generates thrust from the natural decay of radioactive thin films, enabling rendezvous with interstellar objects and missions to the solar gravitational focus. Finally, Alvaro Romero-Calvo, assistant professor at Georgia Tech, and Theo St. Francis, graduate researcher in Georgia Tech's Low-Gravity Science and Technology Lab, discuss their concept, Breathing Beyond Earth, a pump-free oxygen production system for long-duration space missions to Mars. Plus, Bruce Betts, chief scientist of the Planetary Society, joins Sarah for What's Up, with a look ahead to the launch of JAXA's Martian Moons Exploration mission, MMX. Discover more at: https://www.planetary.org/planetary-radio/2026-niac-symposium-part-2See omnystudio.com/listener for privacy information.

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 State University, all about the bold, early-stage concepts being developed to explore them. First, Peter Cabauy, CEO and co-founder of City Labs Incorporated, and Mason Peck, former NASA Chief Technologist and collaborator on the project, discuss their Phase II concept, Autonomous Tritium Micropowered Sensors, tiny nuclear-powered probes designed to survive and operate in the permanently shadowed craters of the Moon and beyond. Then, Daniel Drew, assistant professor of electrical and computer engineering at the University of Hawaiʻi at Mānoa, introduces SPARK, a Phase I concept for silent, solid-state flying robots that could explore caves on Saturn's moon Titan. Finally, Gilly Elor, physics lead at Stone Aerospace, and Bill Stone, founder of Stone Aerospace, walk us through LUX, the Lunar Underground Explorer, a Phase I concept for a laser-powered, fiber-tethered drone that could be the first mission to enter a cave on another world. Plus, Bruce Betts, chief scientist of The Planetary Society, joins Sarah for What's Up, where they preview Saturn at opposition and the start of World Space Week on October 4th. Discover more at: https://www.planetary.org/planetary-radio/2026-niac-symposium-part-1 See omnystudio.com/listener for privacy information.

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, walks us through the findings on the asteroid, what they mean for planetary defense, and what's ahead as the spacecraft cruises toward its next target. Then Bruce Betts, chief scientist at The Planetary Society, digs into Hayabusa2's history of firing things at asteroids. Discover more at: https://www.planetary.org/planetary-radio/2026-hayabusa2-torifuneSee omnystudio.com/listener for privacy information.

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 enthralling book became a popular selection in The Planetary Society’s member book club. He recently joined the Society’s Mat Kaplan for a deep exploration of the best science. Kevin also shared tales of his own harrowing, revealing journeys through Earth’s undersea world. Discover more at: https://www.planetary.org/planetary-radio/book-club-kevin-handSee omnystudio.com/listener for privacy information.

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 Roddenberry asking fans to join a brand new organization called The Planetary Society. Tim Russ, who played Tuvok on Star Trek: Voyager, Deep Space Nine, Lower Decks, and Picard, joins us to talk about what the Vulcans can teach us about the discipline we'll need to survive in deep space, and shares his own experience as an amateur astronomer who contributed data to NASA's Lucy mission. Karim Diané, Jay-Den Kraag on Star Trek: Starfleet Academy, talks about playing a Klingon who defies everyone's expectations of what it means to be strong. And Bruce Betts, chief scientist of The Planetary Society, is here with What's Up, discussing Star Trek technologies. Discover more at: https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-2See omnystudio.com/listener for privacy information.

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 Hologram from Star Trek: Voyager, now starring in Star Trek: Starfleet Academy and a member of The Planetary Society's Board of Directors, joins Sarah Al-Ahmed to trace the relationship between Star Trek and The Planetary Society all the way back to a 1980 letter from Gene Roddenberry himself. Bob talks about how playing a holographic doctor for 30 years led him to become a real-world space advocate, and what Star Trek's non-human characters can teach us about what it means to be human. Then, Bruce Betts, Planetary Society Chief Scientist, joins for What's Up and a discussion of solar sails in the franchise. Discover more at: https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-1See omnystudio.com/listener for privacy information.