Supernovae, Stellar Mapping, and Saturn’s New Moons: S28E34

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 (https://academic.oup.com/mnras)

NASA

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

Planetary Science Journal

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

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Episode link: https://play.headliner.app/episode/26170743?utm_source=youtube