Earth's Core, Hypervelocity Stars & Cosmic Dandruff: #497 - Unraveling the Mysteries Below and Beyond

This episode is brought to you with help of NordVPN. To get the special birthday deal, visit www.nordvpn.com/spacenuts - you'll be glad you did.Space Nuts Episode 497: Earth's Core Dynamics, Hypervelocity Stars, and Cosmic DustJoin Andrew Dunkley and Professor Jonti Horner in this captivating episode of Space Nuts as they delve into the intriguing dynamics of our planet's core, the discovery of a hyperactive star with a planet, and the fascinating phenomenon of cosmic dust. From the slowing of Earth's inner core to the implications of interstellar objects entering our solar system, this episode is filled with insights that will ignite your curiosity about the universe.Episode Highlights:- Earth's Core Dynamics: Andrew and Jonti discuss the recent findings regarding the Earth's inner core, revealing that it has been slowing down. They explore how researchers used data from repeating earthquakes to uncover the complexities of the core's rotation and its implications for our understanding of Earth's geology.- Hypervelocity Stars: The duo introduces the concept of hypervelocity stars and highlights a newly discovered star that is moving at an astonishing speed of nearly 2 million kilometers per hour. They discuss the significance of this find and its connection to the planet orbiting this remarkable star.- Cosmic Dust from Neighboring Systems: Andrew and Jonti explore the idea of "space dandruff," where neighboring solar systems contribute to the influx of cosmic dust in our own. They discuss simulations that suggest a million objects from the Alpha Centauri system are currently passing through our solar system, and the potential for detecting these interstellar visitors.- Debate on Planetary Classification: The episode wraps up with a discussion on a newly discovered object that challenges the boundaries between planets and brown dwarfs. Jonti explains the ongoing debate regarding the definitions of these celestial bodies and how new discoveries are prompting scientists to reconsider traditional classifications.For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. Follow us on social media at SpaceNutsPod on Facebook, X, YouTube Music Music, Tumblr, Instagram, and TikTok. We love engaging with our community, so be sure to drop us a message or comment on your favorite platform.If you'd like to help support Space Nuts and join our growing family of insiders for commercial-free episodes and more, visit spacenutspodcast.com/aboutStay curious, keep looking up, and join us next time for more stellar insights and cosmic wonders. Until then, clear skies and happy stargazing.00:00 - Introduction to the episode and topics02:15 - Discussion on Earth's core dynamics and slowing rotation10:30 - Exploration of hypervelocity stars and their implications18:00 - The phenomenon of cosmic dust from neighboring systems26:45 - Debate on planetary classification and the discovery of Gaia 4B30:00 - Closing thoughts and listener engagement✍️ Episode ReferencesEarth's Inner Core Researchhttps://www.nature.com/articlesHypervelocity Stars and Planet Discoveryhttps://www.space.com/hypervelocity-starsCosmic Dust Studieshttps://www.sciencedirect.com/science/article/pii/S0019103519302003Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.