Earth's Elemental Mysteries, Ariel's Geological Secrets, and Comet Atlas's Demise: S28E20

SpaceTime Series 28 Episode 20
The Astronomy, Space and Science News Podcast
New Discoveries on Earth's Elements, Uranus's Moon Ariel, and the Fate of Comet Atlas
In this episode of SpaceTime, we delve into a groundbreaking study that challenges long-held beliefs about the origins of Earth's missing moderately volatile elements, such as copper and zinc. This research suggests that rather than being lost during the early formation of the solar system, these essential elements were likely retained by the first planetesimals and lost later due to violent cosmic collisions during planetary growth, reshaping our understanding of planetary chemistry and habitability.
Uranus's Moon Ariel: A Window to Its Interior
We also explore the fascinating trench-like features on Uranus's moon Ariel, which may serve as conduits for internal materials. New research indicates that these medial grooves could provide insights into Ariel's geological history and potential subsurface oceans, highlighting the complex interplay of tectonic and volcanic activities on the moon's surface.
Comet Atlas: A Dying Wonder
Additionally, we discuss the fate of Comet G3 Atlas, which has recently passed perilously close to the Sun, resulting in the fragmentation of its nucleus. As it fades from view, Atlas becomes a headless wonder, leaving behind a trail of debris that will continue to orbit the Sun. This episode also features a look at the stunning night skies of February, including the iconic constellations and celestial events to observe.
00:00 Space Time Series 28 Episode 20 for broadcast on 14 February 2025
00:49 New insights into Earth's missing elements
06:30 Trench-like features on Uranus's moon Ariel
12:15 The demise of Comet G3 Atlas
18:00 February night sky highlights
22:45 The constellation Orion and its myths
27:00 Exploring the Pleiades and other celestial wonders
30:15 The significance of the Milky Way in stargazing
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✍️ Episode References
NASA
https://www.nasa.gov
Science Advances
https://www.science.org/journal/sciadv
Planetary Science Journal
https://www.journals.elsevier.com/planetary-science-journal
Sky and Telescope
https://skyandtelescope.org

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