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

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Recorded19 Mar 2025

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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 www.spacetimewithstuartgary.com (https://www.spacetimewithstuartgary.com/) www.bitesz.com (https://www.bitesz.com/) 🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn (https://www.bitesz.com/nordvpn) . Enjoy incredible discounts and bonuses! Plus, it’s risk-free with Nord’s 30-day money-back guarantee! ✌ Check out our newest sponsor - Old Glory - Iconic Music and Sports Merch and now with official NASA merchandise. (https://www.bitesz.com/oldglory) Well worth checking out... Become a supporter of this Podcast for as little as $3 per month and access commercial-free episodes plus bonuses: https://www.spacetimewithstuartgary.com/about (https://www.spacetimewithstuartgary.com/about) ✍️ 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/) Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support (https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support?utm_source=rss&utm_medium=rss&utm_campaign=rss) . Episode link: https://play.headliner.app/episode/26170743?utm_source=youtube

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