Callisto’s Ocean Secrets, Lasers Unveiling Mars’ Past Life, and ISS Cleanliness Concerns: S28E29

SpaceTime Series 28 Episode 29

The Astronomy, Space and Science News Podcast

Exploring Callisto's Ocean Potential, Laser Fossil Detection on Mars, and ISS Cleanliness Concerns

In this episode of SpaceTime, we dive into exciting new research suggesting that Jupiter's moon Callisto may harbor a subsurface ocean, potentially making it another ocean world in our solar system. This revelation builds on data from NASA's Galileo spacecraft, which hinted at the presence of a salty liquid water ocean beneath Callisto's icy crust. Advanced modeling techniques have strengthened these claims, setting the stage for further exploration by NASA's Europa Clipper and ESA's Juice missions.

Lasers on Mars: Searching for Ancient Life

We also discuss innovative research that proposes using lasers to identify ancient microbial fossils on Mars. Scientists have successfully detected microbial fossils in gypsum on Earth, raising hopes that similar techniques could uncover evidence of past life on the Red Planet. The findings suggest that gypsum deposits on Mars could conceal traces of ancient life, preserved in mineral formations that formed when water evaporated billions of years ago.

Health Implications of Sterility on the ISS

Additionally, we explore a new study indicating that the overly sterile environment of the International Space Station may be negatively impacting astronaut health. The research suggests that introducing a diverse range of microbes could potentially alleviate immune dysfunction and other health issues experienced by crew members during long missions in space.

00:00 Space Time Series 28 Episode 29 for broadcast on 7 March 2025

00:49 New findings on Callisto's potential subsurface ocean

06:30 Implications for future missions to Jupiter's moons

12:15 Using lasers to detect ancient life on Mars

18:00 Analysis of gypsum deposits and their significance

22:45 Concerns regarding ISS cleanliness and astronaut health

27:00 Overview of March's night sky and celestial events

30:15 Celebrating PI Day and its significance in astronomy

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✍️ Episode References

NASA

https://www.nasa.gov (https://www.nasa.gov/)

AGU Advances

https://agupubs.onlinelibrary.wiley.com/journal/23335784 (https://agupubs.onlinelibrary.wiley.com/journal/23335784)

Cell

https://www.cell.com/ (https://www.cell.com/)

Frontiers in Astronomy and Space Sciences

https://www.frontiersin.org/journals/astronomy-and-space-sciences (https://www.frontiersin.org/journals/astronomy-and-space-sciences)

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Episode link: https://play.headliner.app/episode/25944354?utm_source=youtube