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In this episode of SpaceTime , we explore groundbreaking discoveries and significant events unfolding in our universe.

Galactic Collision Course: Two Massive Galaxy Clusters Set for Round Two

Astronomers have observed a rare cosmic event as two massive galaxy clusters, previously collided, are now on a trajectory for another encounter. Located 2.8 billion light-years away, the clusters—designated PSE2G 181.06.48.47—exhibit fascinating structures and shock fronts indicative of their impending collision. We delve into the implications of this rare event and what it reveals about the dynamics of galaxy clusters and dark matter.

NASA's Psyche Mission Switches to Backup Systems

NASA has been compelled to switch to a backup fuel system on its Psyche spacecraft after a drop in fuel pressure was detected in the main propulsion system. We discuss the technical challenges faced by the mission team, the significance of the asteroid Psyche, and what this means for the spacecraft's journey to explore this intriguing metallic asteroid, scheduled for arrival in 2029.

Discovery of a New Atomic Nucleus

For the first time in over three decades, scientists have measured the heaviest nucleus decaying through proton emission. This discovery, involving the lightest known isotope of astatine-188, sheds light on the rare form of radioactive decay and the intricate properties of exotic nuclei. We explore the experimental techniques used and the theoretical implications of this groundbreaking finding.

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✍️ Episode References

Astrophysical Journal

https://iopscience.iop.org/journal/0004-637X (https://iopscience.iop.org/journal/0004-637X)

NASA Psyche Mission

https://www.nasa.gov/psyche (https://www.nasa.gov/psyche)

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00:00 This is Space Time Series 28, Episode 71 for broadcast on 13 June 2025

01:00 Galactic collision course: Two massive galaxy clusters set for round two

12:15 NASA's Psyche mission switches to backup systems

22:30 Discovery of a new atomic nucleus

30:00 Science report: Unprecedented ocean warming in the South Pacific

Episode link: https://play.headliner.app/episode/27613987?utm_source=youtube

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Collision Course? And the Mysteries of the Aurora

In this captivating episode of Space Nuts , hosts Heidi Campo and Professor Fred Watson delve into a range of astronomical topics that illuminate our understanding of the universe. From the latest findings regarding the fate of the Milky Way and Andromeda galaxies to the enchanting phenomena of auroras, this episode is sure to spark your cosmic curiosity.

Episode Highlights:

- Milky Way and Andromeda Collision: The episode kicks off with an exciting update on the potential collision between our galaxy and Andromeda. Fred discusses new research suggesting that gravitational influences from nearby galaxies may alter the predicted course of this cosmic encounter, making the odds of a disastrous collision lower than previously thought.

- Understanding Fiducial Models: Heidi and Fred explore the concept of fiducial models in astronomical predictions, clarifying their role in understanding complex orbital dynamics and the challenges of measuring motion across vast cosmic distances.

- The Flying Banana and Aurora Chasers: The duo transitions to a whimsical story about a laser-emitting train dubbed the "Flying Banana," which inadvertently confused aurora hunters with its blue light. Fred shares insights into the aurora borealis and the technology used to monitor and study these stunning natural displays.

- Japanese Moon Mission Setback: The episode also covers the recent setback of the Japanese lunar lander mission, highlighting the challenges faced by space exploration endeavors and the lessons learned from failures.

- Mars Odyssey's Stunning Views: Lastly, Fred discusses the Mars Odyssey orbiter's recent capture of breathtaking images of Martian volcanoes peeking above morning clouds, showcasing the ongoing exploration and discoveries being made on the Red Planet.

For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. (https://www.spacenutspodcast.com/) 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.

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Stay 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) Welcome to Space Nuts with Heidi Campo and Fred Watson

(01:20) Discussion on the Milky Way and Andromeda collision predictions

(15:00) Exploring fiducial models in astronomy

(25:30) The Flying Banana and aurora phenomena

(35:00) Japanese moon mission failure and its implications

(45:00) Mars Odyssey's stunning volcanic views

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Episode link: https://play.headliner.app/episode/27612670?utm_source=youtube