The Reach of a Giant

Astronomy Daily S05E154 — “The Reach of a Giant.” Thursday, 30 July 2026. Hosted by Anna and Avery. In this episode •    A supermassive black hole caught heating and stirring an entire galaxy cluster — turbulence reaching ~300,000 light-years, about 100× more energetic than expected (XRISM / quasar H1821+643). •    Why some “clean” white dwarfs are secretly feasting: magnetic fields funnel shredded planetary debris to the poles, aurora-style, hiding the meal. •    NASA’s Psyche used its Mars flyby as a dress rehearsal — spotting Phobos and Deimos from afar to practise for its 2029 moonlet hunt at asteroid 16 Psyche. •    A new study on keeping the road to the Moon clear: modelling how debris disperses in Distant Retrograde Orbits as cislunar traffic climbs. •    Skywatch: tonight’s double meteor shower — the Southern Delta Aquariids and Alpha Capricornids — with both-hemispheres viewing details and local times. Sources •    Yamada, S. et al., “Vigorous turbulence driven by quasar-mode feedback in a cluster core,” Nature Astronomy, 28 July 2026 (DOI 10.1038/s41550-026-02939-x; arXiv 2607.24911). Tohoku University release. •    “White Dwarfs Eat More Planetary Debris Than Thought, But Magnetic Fields Hide It,” Universe Today, 29 July 2026 (Pham et al., arXiv 2607.20747). •    “NASA’s Psyche Spacecraft Aces Mars Flyby,” NASA JPL / ScienceDaily, 28 July 2026. •    “The Risks of Debris Between the Earth and the Moon for Future Exploration,” Universe Today, 29 July 2026 (Chinese Academy of Sciences DRO study). •    Double meteor shower peak: American Meteor Society; NASA; Scientific American; CNN; National Geographic, 28–30 July 2026. Correction / caveat desk •    Skywatch numbers assume the ~98% waning Buck Moon (full 29 Jul). Faint Delta Aquariids will be washed out; the Alpha Capricornid fireballs are the reliable catch tonight.Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-latest-space-news--5648921/support.Sponsor Details:Ensure your online privacy by using NordVPN. To get our special listener deal and save a lot of money, visit www.astronomydaily.io/nordvpn. You'll be glad you did!Get the best secure and private email on the planet. Stop your Government, google and who knows who else spying on every email you write. Do what we did and use ProtonMail. They beleive in privacy and there are no ads in their business model...yet they still provide a free forever service. Check them out and get out special deal at www.astronomydaily.io/protonmailBecome a supporter of Astronomy Daily by joining our Supporters Club. Commercial free episodes daily are only a click way... Click HereThis episode includes AI-generated content.