Earth’s Spin Shift: Human Impact, New Worlds Beyond Pluto, and Mars Moon Missions

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Recorded23 Jul 2025

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This episode of SpaceTime is brought to you with the support of Incogna i - when your online privacy matters, Incogni's the service you need. Check out our special discount dea l by visiting www.incogni.com/stuartgary (https://incogni.com/stuartgary) In this episode of SpaceTime , we delve into groundbreaking discoveries that reveal the impact of human activity on Earth, explore a new celestial body beyond Pluto, and prepare for Japan's upcoming Martian moon mission. Human Development and Earth's Polar Shift A recent study published in Geophysical Research Letters has confirmed that human development has caused a significant shift in Earth's spin axis. By constructing nearly 7,000 dams between 1835 and 2011, humans have redistributed the planet's mass, resulting in a total pole shift of about 1.13 meters. Lead author Natasha Valencic explains how this shift not only affects Earth's rotation but also contributes to a global drop in sea levels. The findings underscore the importance of considering water impoundment in future sea level rise calculations. Discovery of a World Beyond Pluto Astronomers have identified a small celestial object, designated 2023 KQ14, located beyond Pluto, potentially challenging the existence of the elusive Planet Nine. This discovery, detailed in Nature Astronomy, suggests that the outer solar system is more diverse than previously thought. With a stable orbit for over 4.5 billion years, 2023 KQ14's peculiar trajectory raises questions about the formation and evolution of distant solar system bodies, as well as the dynamics of gravitational influences in this remote region. Japan's Martian Moon Sample Return Mission Japan's aerospace exploration agency JAXA is set to launch the Martian Moons Exploration Mission (MMX) in 2026. This ambitious mission aims to land on Phobos, collect samples, and return them to Earth by 2031. The spacecraft will also conduct a flyby of Deimos while gathering crucial data to determine the origins of Mars' moons. With advanced scientific instruments onboard, the mission seeks to unravel the mysteries surrounding these small, potato-shaped moons and their relationship to the Red Planet's history. www.spacetimewithstuartgary.com (https://www.spacetimewithstuartgary.com/) ✍️ Episode References Geophysical Research Letters https://agupubs.onlinelibrary.wiley.com/journal/19448007 (https://agupubs.onlinelibrary.wiley.com/journal/19448007) Nature Astronomy https://www.nature.com/natureastronomy/ (https://www.nature.com/natureastronomy/) 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/28221077?utm_source=youtube

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