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Space Nuts: Vanishing Stars, White Holes, Earth’s Mass and Neutrinos

In this listener Q&A episode of Space Nuts , Andrew Dunkley and Professor Fred Watson tackle four cosmic questions that stretch from distant stars to the nature of space-time. They explain why a star billions of light-years away would still appear in our sky long after it had gone out, and why looking across the universe means looking back through time. Next, they consider whether white holes are the opposite of black holes, then investigate whether dark matter could affect our measurements of Earth’s mass and gravity. Finally, they explore how neutrinos interact with gravity, whether black holes can capture them, and why space-time itself is not something a black hole can consume. Join Andrew and Fred Watson Watson for big ideas, listener curiosity and the occasional detour into the value of the Earth in dollars.

Key topics

- How light-travel time means we see distant stars as they were in the past.

- White holes as theoretical solutions to relativity, and how they differ from black holes.

- Whether dark matter contributes to Earth’s measured gravity and mass.

- The mass of the Earth and how astronomers determine it.

- Neutrinos, gravity, black holes and whether space-time can be consumed.

Timestamps

00:00 - Introduction and listener questions

01:30 - If a distant star goes out, when would we see it happen?

06:30 - Looking back in time across the observable universe

10:00 - What are white holes, and are they the opposite of black holes?

15:30 - Could dark matter affect measurements of Earth’s gravity?

20:30 - How the mass of Earth is determined

23:30 - Do neutrinos interact with gravity, and can black holes capture them?

27:00 - Could a black hole feed on space-time itself?

30:00 - How to send questions to Space Nuts and closing remarks

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Monday SpaceTime 20261109 Series 29 Episode 134 Growing hints of volcanic activity on Mars The European Space Agency’s ExoMars Trace Gas Orbiter has detected signs of volcanic activity on the red planet. NASA’s Swift Space Telescope destroyed NASA’s Swift gamma space telescope has re-entered the Earth’s atmosphere in an uncontrolled descent, burning up in the skies above the Pacific Ocean. China details its manned Moon program China has released details of its manned Moon program, confirming that it expects to have taikonauts walking on the lunar surface before 2030 . The Science Report Study shows patients with female doctors do better in hospitals. El Niño to strengthen to unprecedented levels over the next three months. Claims kids who eat more ultra-processed foods may respond to food differently. Palaeontologists find fossilised dinosaur red blood cells and amino acids. Skeptics guide to rebranding the fake science of homeopathy. Our Guests This Week Swift Program Scientist Ilana Harrus from NASA Greenhill Observatory Director Professor Andrew Cole from the University of Tasmania 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 The Big Bang editions 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 too. Thank you…

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Is Mars still volcanically alive? Europe's ExoMars Trace Gas Orbiter keeps catching hydrogen chloride, a gas that comes out of volcanoes on Earth, above fresh cracks on the giant Alba Mons volcano, in the wrong season, in one place and low to the ground. We unpack the evidence, the proposed 'ice lid', and everything this result is not. Then it's The Week That Was: two black holes in one early galaxy, Swift's fiery end over Sumatra, ESCAPADE's powered slingshots over Australia, a planet rescued from Webb's glare, and the cosmic leaf blower. Plus the week's sky from both hemispheres. In this episode • Lead: Hydrogen chloride detections at Alba Mons as a potential sign of igneous activity on Mars (Trokhimovskiy, Mège et al., Science Advances, 4 Nov 2026). Detections first presented at 2025 conferences. • Week That Was: LID-1166 dual black holes (E220); Swift re-entry, 4 Nov (E221); ESCAPADE powered flybys (E222); FLIP digital-twin coronagraph and 51 Eridani b (E223); Lyman-alpha 'leaf blower' (E224). • Arc updates: AR4566 M3.5 flare and storm watch; Starship Flight 15; Voyager 1 one light-day; BepiColombo; Hera. • Skywatch: Venus and Spica; thin crescent Moon; new Moon 9 Nov; spotting ESCAPADE Gold; Mars–Jupiter 16 Nov; aurora watch; ISO 12312-2 eye safety. Sources • Science Advances, DOI 10.1126/sciadv.aeb9422 — 'Enigmatic HCl detections as a potential signature of igneous activity on Mars' • ESA release, 4 Nov 2026 — European orbiter detects hints of volcanic activity on Mars • NASA ESCAPADE blog, 2 Nov 2026 — science.nasa.gov/blogs/escapade • NASA Swift blog — science.nasa.gov/blogs/swift • EarthSky Sun news, 6 Nov 2026 astronomydaily.io · @AstroDailyPod · Bitesz.com Podcast Network YouTube description Is Mars still volcanically alive? ESA's ExoMars Trace Gas Orbiter has caught hydrogen chloride above fresh fissures on Alba Mons, out of season, in one place, low to the ground. We look at the evidence, the proposed ice lid, and what this result is NOT. Then The Week That Was: dual black holes in LID-1166, Swift's re-entry, ESCAPADE's slingshot over Australia, FLIP and 51 Eridani b, and the cosmic leaf blower. Plus this week's sky for both hemispheres. astronomydaily.io · @AstroDailyPod · Bitesz.com Podcast Network Chapters (estimate — confirm against final audio) 00:00 Cold open 00:40 Is Mars still breathing? Hydrogen chloride at Alba Mons 09:05 The Week That Was 14:10 Skywatch: Venus, Spica, ESCAPADE, Mars and Jupiter 17:30 Outro

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Show notes

Light from newborn stars may have blown the fog out of the early universe. A new study by Shyam Menon (Flatiron Institute, ANU PhD) and Aaron Smith (UT Dallas) finds that Lyman-alpha radiation — ultraviolet light that bounces from hydrogen atom to hydrogen atom — can clear diffuse gas and dust out of young galaxies while leaving their dense star clusters free to keep forming stars, helping explain why JWST sees so many bright galaxies so early. Also: LOFAR's sharpest and deepest low-frequency radio image yet (almost 63,000 sources, 200 hours of observing); Blue Origin's new GS3 third stage and Northstar engine; and Sandia simulations showing that an asteroid's shape and orientation can change a nuclear stand-off deflection by up to five times. Quick hits: the space station's final roll-out solar array is installed, sunspot region AR4566 fires an M3 flare as October's sunspot number falls, and Earth picks up a tiny temporary mini-moon, 2026 QQ8. Skywatch for both hemispheres: ESCAPADE's powered flybys over southern Australia, the Moon with Venus and Spica, New Moon on the 9th, globular cluster M30 for southern observers, and Mars closing on Jupiter before dawn. Sources: Menon & Smith, The Astrophysical Journal (2026), DOI 10.3847/1538-4357/aeaed6 · de Jong et al., arXiv 2611.06152 (accepted A&A) · Blue Origin announcements, 5 Nov 2026 · Moore et al., Icarus (2026) · NOAA SWPC · Minor Planet Center MPEC 2026-U95 · NASA ESCAPADE blog, 2 Nov 2026.

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Friday SpaceTime 20261106 Series 29 Episode 133 Mysterious disturbances from Betelgeuse Astronomers have detected strange happenings on the mysterious companion star that lurks in the shadows of Betelgeuse. Solving the mystery of the Orion Nebula Astronomers may have finally solved the mystery of the Orion Nebula the largest star forming region near Earth. X-37B Space Shuttle still on mission The U.S. Space Force's X-37B spaceplane is now almost 14 months into its latest mission testing new quantum inertial navigation technology. November Skywatch The giant spiral galaxy M31 Andromeda. the Crab Nebula M1 and three meteor showers are among the highlights of the November night skies on Skywatch. Our Guests This Week HERA Principal Investigator Patrick Michel from ESA 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 The Big Bang editions 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 too. Thank you…

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