SpaceTime Series 28 Episode 34
The Astronomy, Space and Science News Podcast
Supernovae's Role in Mass Extinctions, NASA's Stellar Mapping Mission, and New Moons of Saturn
In this episode of SpaceTime, we explore a fascinating new study suggesting that nearby supernovae could have triggered at least two of Earth's mass extinction events. These violent stellar explosions may have stripped away the ozone layer, exposing life to harmful ultraviolet radiation and leading to significant ecological upheaval. We delve into the implications of these findings and how they reshape our understanding of Earth's history.
Nasa's SPHEREx Mission
We also discuss NASA's successful launch of the SPHEREx mission, designed to map the entire celestial sky in unprecedented detail. This mission aims to create a three-dimensional map of over 450 million galaxies, utilizing advanced spectroscopy techniques to analyze infrared light and uncover the mysteries of cosmic inflation and the ingredients necessary for life.
Saturn's Expanding Moon Family
Additionally, astronomers have made an exciting discovery of 128 new moons orbiting Saturn, bringing its total to 274. These tiny moonlets, likely remnants of larger captured moons, offer insights into the history and evolution of the Saturnian system.
00:00 Space Time Series 28 Episode 34 for broadcast on 19 March 2025
00:49 Supernovae and mass extinction events
06:30 The role of supernovae in Earth's history
12:15 Overview of NASA's SPHEREx mission
18:00 Spectroscopy and cosmic inflation studies
22:45 Discovery of new moons around Saturn
27:00 Summary of recent astronomical findings
30:15 Discussion on dietary changes in Australia by 2030
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✍️ Episode References
Monthly Notices of the Royal Astronomical Society
https://academic.oup.com/mnras
NASA
https://www.nasa.gov
Planetary Science Journal
https://www.planetarysciencejournal.com/
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