Science historian Dr. Matt Shindell joins the show to discuss the unique era of commercial lunar exploration, and how planetary exploration has evolved and can continue to evolve on and around the Moon.

Space policy expert Laura Delgado López joins the show to break down the new paper, “Clearing the Fog: The Grey Zones of Space Governance” by Jessica West and Jordan Miller.

UK-based space writer Gurbir Singh, author of the book The Indian Space Programme: India’s Incredible Journey from the Third World towards the First, joins the show to help us understand India’s growing ambitions and capabilities in space.

Though the Space Shuttle program lasted 30 years and built the ISS, it fell short of NASA's goals for cost, reusability, and reliability. Can a program be both a worldly success and a policy failure? In this Space Policy Edition, we dissect a classic space policy paper and debate its relevance today.

NASA's Mars Sample Return mission is both a top priority and seriously troubled. Independent review board chair Orlando Figueroa joins us to talk about the challenges and what must be done.

Scott Pace, the prior executive secretary of the National Space Council, discusses why Artemis is of strategic value to U.S. national interests — and why the Moon is unique as a destination to drive global space exploration.

We check in on the congressional budget process for NASA, Mars Sample Return’s spiraling cost growth, and the impending end of the regulatory holiday for human commercial space launch companies.

Would meeting an extraterrestrial civilization be good or bad for humanity? Astronomer Dr. Jacob Haqq Misra argues that knowing the outcome in advance is fundamentally impossible.

Eric Roesch, an environmental policy expert, joins Planetary Radio to discuss SpaceX's Starship, environmental regulations' role in commercial space travel, and responsible space exploration.

Jean Toal Eisen, former senior staff on the Senate Appropriations Committee, joins the show to reveal the decision-making process, priorities, and motivations of those who control the U.S. space program's funding.