SpaceTime Series 29 Episode 44

*NASA’s Artemis II returns to Earth after its historic mission to the Moon NASA’s Artemis II mission has returned safely to Earth following its historic journey around the Moon. The four person crew splashed down in the North Pacific Ocean off the San Diego coast ending the ten day record setting flight which saw them travel further from mother Earth than humans have ever ventured before. *Astronomers have discovered the most primitive star ever seen Astronomers have identified one of the earliest stars ever seen; and the nearest candidate yet found to the first generation of stars created out the primordial material of the big bang. *Fireball spotted over Victoria, Australia Residents in Rutherglen have reported a large green-tailed fireball streaking across the Victorian skies. It’s the latest is a spate of meteor sightings over the past month or so with others reported in Germany, Ohio, Texas, and Washington State.. *The Science Report A new study has shown that summer is arriving earlier, lasting longer and packing more heat. Scientists say people with obstructive sleep apnoea have a 71% higher risk of heart issues or death. The Australian Navy getting a new fleet of 40 Bluebottle unmanned warships. Skeptics guide to the creep of creationism in schools Our Guests This Week: DSN Spokesperson Rhianna Lyons from the CSIRO Sean Hodgman from the Australian National University Yogesh Sridhar from the Australian National University And our regular guests: Alex Zaharov-Reutt from techadvice.life Tim Mendham from Australian Skeptics 🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn (http://www.bitesz.com/nordvpn) . The discounts and bonuses are incredible! And it’s risk-free with Nord’s 30-day money-back guarantee! ✌ If you’d like to support the podcast and gain access to bonus content by becoming a SpaceTime crew member, you can do just that through premium versions on Patreon, Spotify and Apple Podcasts. Details on the Support page on our website https://www.bitesz.com/show/spacetime/support/ (https://www.bitesz.com/show/spacetime/support/)

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Relativistic Doppler Beaming, Martian Water, and Fusion Confusion

In this engaging Q&A edition of Space Nuts , hosts Andrew Dunkley and Professor Fred Watson dive into a variety of thought-provoking listener questions that explore the depths of astronomy and space science. From the complexities of relativistic Doppler beaming in black holes to the intriguing evidence of water on Mars and the mysteries of nuclear fusion in the sun, this episode is brimming with cosmic insights and scientific clarity.

Episode Highlights:

- Relativistic Doppler Beaming: Ron from New York asks about the brightness differences in black hole accretion disks. Andrew and Fred explain how relativistic speeds affect light emission, leading to the phenomenon known as Doppler beaming and why we don't see the expected color shifts.

- Water on Mars: Sunny from California questions the geological evidence for water on Mars. The hosts discuss the findings from the Phoenix lander and the implications of briny water on the Martian surface, confirming that it was indeed water, albeit potentially different from what we know on Earth.

- Earth's Mass and Space Junk: Holt raises a fascinating question about how much material we can send into space before it impacts Earth's orbit. Andrew and Fred provide insights into the negligible mass we've launched compared to the Earth's total mass, reassuring listeners that our planet remains unaffected.

- Fusion Reactions in the Sun: Ken from Maroochydore seeks clarification on the fusion process in the sun, specifically regarding mass loss and binding energy. The hosts unravel the complexities of fusion, explaining how energy is produced and the significance of mass defects in nuclear reactions.

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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.

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SpaceTime Series 29 Episode 43 *Climate change is slowing Earth's spin at an unprecedented rate A new study has found that climate change is slowing the Earth rotation at an unprecedented rate compared to past 3.6 million years *Magnetic waves discovered deep inside the Sun Scientists have detected large scale magnetic waves moving deep inside the Sun. The discovery reported in the journal Nature Astronomy could help scientists predict solar activity. *Mystery medical evacuation from space station finally explained That mystery medical evacuation from the International Space Station earlier this year has finally been explained. *April SkyWatch The splendours of the Southern Cross and its two pointer stars Alpha and Beta Centauri, the blue Supergiant Canopus and the Lyrids meteor shower are among the highlights of the April night skies on SkyWatch. Our Guests This Week: Artemis lunar science lead Kelsey Young from NASA’s Goddard Space Flight Centre And our regular guests: Alex Zaharov-Reutt from techadvice.life Tim Mendham from Australian Skeptics And Senior science writer and Sky and Telescope magazine contributor Jonathan Nally 🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn (http://www.bitesz.com/nordvpn) . The discounts and bonuses are incredible! And it’s risk-free with Nord’s 30-day money-back guarantee! ✌ If you’d like to support the podcast and gain access to bonus content by becoming a SpaceTime crew member, you can do just that through premium versions on Patreon, Spotify and Apple Podcasts. Details on the Support page on our website https://www.bitesz.com/show/spacetime/support/ (https://www.bitesz.com/show/spacetime/support/)

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The Artemis II crew — Reid Wiseman, Victor Glover, Christina Koch and Jeremy Hansen — are on final approach to Earth after nine historic days in deep space. Splashdown is scheduled for Friday off San Diego. We have the full countdown, plus the story behind what NASA scientists called 'audible screams of delight' when the crew spotted micrometeorite impact flashes on the Moon during their lunar flyby. Also in today's episode: astronomers at ISTA in Austria have identified a brand new class of stellar remnant — two ultra-massive, X-ray emitting white dwarfs named Gandalf and Moon-Sized. Mars continues to disappoint on the habitability front. Four planets are lining up in April skies. And we close with the story of four astronauts, their iPhones, and the greatest selfies in human history. Sources & links: • Artemis II splashdown coverage: nasa.gov/artemis • Micrometeorite impacts & lunar science: space.com | sciencenews.org | spaceq.ca • Gandalf & Moon-Sized white dwarfs: ista.ac.at | universetoday.com • Mars surface habitability: universetoday.com • April planet alignment: starwalk.space • Artemis II iPhone photography: space.com | engadget.com

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Artemis 2 Launch, Australian Astronomy Setbacks, and the Mystery of X-Ray Binaries

In this thrilling episode of Space Nuts , hosts Andrew Dunkley and Professor Fred Watson dive into the latest advancements in space exploration and the challenges faced by the Australian astronomy community. The successful launch of Artemis 2 marks a significant milestone for humanity's return to the Moon, while a recent government decision leaves Australian astronomers concerned about their future access to critical telescopes. The episode also explores the intriguing discovery of an X-ray binary that defies conventional understanding, revealing new mysteries in the cosmos.

Episode Highlights:

- Artemis 2 Launch: Andrew and Fred share their excitement over the successful launch of Artemis 2, discussing the mission's significance and the historic achievements of the crew as they become the first humans to travel further than Apollo 13.

- Australian Astronomy Challenges: The hosts delve into the Australian government's decision to discontinue its partnership with the European Southern Observatory, examining the potential impact on local astronomers and the future of optical astronomy in Australia.

- X-Ray Binary Discovery: A fascinating conversation unfolds around the discovery of two peculiar X-ray binaries that challenge existing theories, leading to discussions about the nature of these celestial objects and what they reveal about stellar evolution.

- Future of Astronomy: Andrew and Fred reflect on the implications of these developments for the broader astronomy community, contemplating the balance between funding, scientific advancement, and international collaboration.

For more Space Nuts, including our continuously 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, Instagram, and more. 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.

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Today's Space News — Astronomy Daily S05E84 | April 8, 2026 In today's episode, Anna and Avery cover six incredible stories spanning the final days of humanity's return to deep space, a lost spacecraft mystery, and fresh science rewriting how we understand our own planet. TODAY'S STORIES: (00:00) Intro (01:30) Story 1 — Artemis II Day 7/8: science debrief done, trajectory burns fired, and the crew heads home for a historic splashdown Friday (08:00) Story 2 — Cygnus CRS-24 launch delayed to April 10 due to weather — now launching the same day Artemis II lands (13:00) Story 3 — Earth formed entirely from inner Solar System material: Jupiter blocked everything else, and water was already here (19:00) Story 4 — ESA Juice delivers stunning new data on interstellar comet 3I/ATLAS: 70 Olympic pools of water per second (24:00) Story 5 — Comet C/2025 R3 PanSTARRS is the new comet to watch this April — and it's looking good (29:00) Story 6 — FEATURE: Mars 96, the lost Mars mission that crashed back to Earth 30 years ago — and was never found Subscribe for daily space and astronomy news | astronomydaily.io | @AstroDailyPod

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SpaceTime Series 29 Episode 42 *NASA looking at nine possible landing sites for man’s return to the Moon NASA have narrowed down their list of possible landing sites for their return of humans to the lunar surface. The Artemis IV mission will target one of nine possible landing sites around the lunar south pole. *Saturn's weird magnetic shield A new study has found that Saturn’s magnetosphere – the magnetic bubble surrounding the ringed world – is lopsided. *Concerns grow as a Starlink satellite explodes in orbit SpaceX are still trying to determine what caused the sudden break up of a Starlink broad band communication satellite last week. *The Science Report Climate change to push more venomous snakes towards populated communities. Germany checking out Australia’s MQ-28 Ghost Bat autonomous combat aircraft. Teens turning to artificial intelligence for emotional support, validation, and companionship. Alex on Tech new Intel CPU 🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn (http://www.bitesz.com/nordvpn) . The discounts and bonuses are incredible! And it’s risk-free with Nord’s 30-day money-back guarantee! ✌ If you’d like to support the podcast and gain access to bonus content by becoming a SpaceTime crew member, you can do just that through premium versions on Patreon, Spotify and Apple Podcasts. Details on the Support page on our website https://www.bitesz.com/show/spacetime/support/ (https://www.bitesz.com/show/spacetime/support/) For more SpaceTime and show links: https://linktr.ee/biteszHQ (https://linktr.ee/biteszHQ) If you love this podcast, please get someone else to listen to. Thank you…

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