Martian Oceans and Lunar Mysteries: Uncovering the Secrets of Our Cosmic Neighbours

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Recorded16 Oct 2025

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In this episode of SpaceTime , we explore groundbreaking discoveries that reshape our understanding of Mars, the Moon, and the Milky Way Galaxy. Ancient Oceans on Mars: Geological Evidence Revealed A new study published in the journal Geophysical Research Letters presents compelling geological evidence that Mars' Northern Hemisphere was once home to a vast ocean. Lead author Chris from the University of Arkansas discusses how comparisons between river rocks on Earth and Martian sediment reveal ancient river deltas and backwater zones, suggesting that liquid water flowed on the Red Planet, increasing the possibility of past life. This episode delves into the processes of sedimentation and erosion that shaped Mars' landscape, providing insights into its watery past. The Moon's South Pole-Aitken Basin: Unveiling Impact Mysteries A fresh analysis of the Moon's largest impact crater, the South Pole-Aitken Basin, sheds light on its formation and the Moon's geological history. Researchers have discovered that this massive crater's shape indicates an impact from the north, challenging previous assumptions. As the Artemis missions prepare to land near this basin, they will have the opportunity to study material excavated from the lunar interior, potentially unlocking secrets about the Moon's evolution and the asymmetries in its crust. Nancy Chris Roman Space Telescope: Mapping the Milky Way NASA's upcoming Nancy Chris Roman Space Telescope is set to revolutionise our understanding of the Milky Way's interstellar medium. This mission will map around 20 billion stars, using infrared light to penetrate the dust clouds obscuring our view. Chief investigator Catherine Zucker explains how this data will refine our models of star formation and the galaxy's structure, while also addressing the ongoing mysteries of galactic spiral patterns and their role in star birth. 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 https://www.nature.com/nature (https://www.nature.com/nature) NASA Nancy Chris Roman Space Telescope https://roman.gsfc.nasa.gov/ (https://roman.gsfc.nasa.gov/) Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support (https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support?utm_source=rss&utm_medium=rss&utm_campaign=rss) . Ancient Oceans on Mars: Geological Evidence Revealed The Moon's South Pole-Aitken Basin: Unveiling Impact Mysteries Nancy Chris Roman Space Telescope: Mapping the Milky Way (00:00) Evidence of ancient oceans on Mars (10:15) New insights into the Moon's largest impact crater (19:30) The upcoming Nancy Chris Roman Space Telescope mission (27:00) Science Robert: Heatwaves and their impact on global mortality Episode link: https://play.headliner.app/episode/29576292?utm_source=youtube

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