Ep. 799: Heavy Lift Rockets

Ep. 798: Our Summer Media List

Jun 22, 202634 minSummary

In this episode of Astronomy Cast, the hosts take a break from their usual cosmic deep dives to share their personal summer media recommendations. With the podcast entering its summer hiatus, the hosts curate a diverse list of books, television shows, movies, and video games designed to fill the gap for their listeners. The discussion begins with literature, highlighting Chanda Prescod-Weinstein’s The Edge of Space Time, which explores complex ideas in particle physics and language, and Eric Berger’s Reentry, a journalistic account of the evolution of reusable rocketry. The hosts also delve into fantasy, recommending Joe Abercrombie’s gritty trilogies and the uniquely addictive Dungeon Crawler Carl series. Turning to television, the conversation shifts to Apple TV’s mind-bending series Severance and the dystopian Alien: Earth, while exploring the comfort of rewatching classics like Stargate SG-1 and Bill and Ted’s Excellent Adventure. Finally, the hosts discuss their gaming habits, focusing on the tactical depth of Slay the Spire and the complex, loot-driven world of Path of Exile. This episode serves as an engaging guide for anyone seeking intellectually stimulating or highly entertaining media to enjoy throughout the summer.

Ep. 797: Summer in Space

Jun 15, 202634 minSummary

In this episode of Astronomy Cast, hosts Fraser Cain and Dr. Pamela Gay provide a preview of the space-related events and milestones expected during the summer of 2026. While the hosts prepare for a short hiatus, they guide listeners through a calm but intriguing docket of upcoming celestial and exploratory milestones. The discussion highlights key scientific missions, including the Hayabusa 2 flyby of a new asteroid and the Chinese Tianwen 2 mission’s encounter with a quasi-moon. The hosts also touch upon the highly anticipated launch of the Nancy Grace Roman Space Telescope, an infrared survey observatory. Natural phenomena are also on the schedule, with a focus on the Perseid meteor shower, which benefits from favorable moon conditions, and a partial lunar eclipse. Beyond scheduled events, the episode addresses the shifting landscape of private spaceflight, specifically the current hurdles faced by SpaceX’s Starship program and the recovery efforts at Blue Origin. By blending updates on high-stakes rocket development with the beauty of upcoming astronomical sightings, the hosts ensure that listeners remain informed and engaged with the cosmos throughout the summer months.

Ep. 796: Oceans & Organics on Mars

Jun 8, 202630 minSummary

In this episode of Astronomy Cast, hosts Fraser Cain and Dr. Pamela Gay explore the evolving scientific search for life on Mars. The discussion begins with the historical context of the Viking missions, which provided inconclusive data that led to decades of debate regarding the presence of water and life on the Red Planet. The hosts trace the transition from early theories attributing Martian surface features to wind-driven processes to the modern understanding confirmed by missions like Spirit, Opportunity, and Curiosity. The conversation highlights the shift toward the follow-the-water strategy, noting how orbiters and rovers identified compelling evidence—such as cracked mud, ancient lake beds, and water ice—suggesting Mars was once a warmer, wetter environment. The hosts delve into the significant discovery of complex organic molecules by the Curiosity rover and the identification of potential biosignatures by Perseverance in the Jezero Crater. The episode concludes by emphasizing that while current rovers have pushed the boundaries of in-situ exploration, the ultimate goal remains a sample return mission, which is essential to definitively determine whether life ever existed on Mars.

Ep. 795: Expanse Science

Jun 1, 202632 minSummary

In this episode of Astronomy Cast, the hosts conclude their series on science fiction universes by examining The Expanse, which they celebrate as an exceptional example of realistic, physics-based storytelling. The discussion focuses on how the series grounded its narrative in plausible science, specifically regarding Newtonian space travel, the physics of fusion propulsion, and the severe physiological challenges of living in different gravitational environments. The hosts delve into the concept of the Epstein Drive, a high-efficiency fusion propulsion system, and explain how the show accurately depicts space combat by emphasizing the dangers of G-forces and the necessity of managing internal spacecraft environments. They also explore the darker, more speculative elements of the series, such as the protomolecule, which they analyze as an example of directed panspermia and a tool for cosmic-scale civilization resetting. Throughout the episode, the hosts highlight how The Expanse successfully integrates complex themes like resource inequality, political power struggles, and human adaptation to space, reinforcing why it remains a benchmark for hard science fiction television.