Astronomy Daily: Latest Space News

S05E158 — “The Crater Makers” · Tuesday 4 August 2026. Four stories on cosmic impacts — and a new map of the X-ray sky — plus a both-hemispheres skywatch. ① A dead Falcon 9 is about to crater the Moon ●        A spent SpaceX Falcon 9 upper stage (catalogued 2025-010D) is predicted to strike the Moon near Einstein Crater on 5 Aug 2026 at ~06:35 UTC — the second documented uncontrolled rocket impact on the Moon. ●        The stage launched Firefly’s Blue Ghost and ispace’s Resilience landers in Jan 2025, then was stranded in a chaotic Earth orbit for ~18 months. Impact speed ~2.4 km/s (~5,400 mph); expected crater ~17–27 m across. ●        Prediction by Bill Gray (Project Pluto). NASA’s LRO can image the site before and after; a ~two-dozen-author campaign is coordinating observers to chase the ejecta plume. ●        Governance angle: no international framework governs cislunar debris — a growing hazard as lunar traffic increases (callback to E154’s distant-retrograde-orbit debris study). Sources: Space.com / Forbes / Reuters (Cris Tolomia) — impact preview, 31 Jul–3 Aug 2026  ·  Project Pluto (Bill Gray) — 2025-010D impact page  ·  ZME Science — impact timing, 3 Aug 2026 ② Neptune’s inner moons: shrapnel of a shattered world ●        JWST NIRSpec spectroscopy of Neptune’s inner moons Larissa, Galatea and Proteus (Caltech; lead author Ryleigh Davis, Mike Brown’s group) detected magnesium-rich phyllosilicates — clay minerals that require liquid water and had never been seen beyond Jupiter. ●        The clays imply the material came from much larger, water-bearing worlds — evidence that Neptune’s original regular moon system was destroyed when Triton (a captured Kuiper Belt object) arrived. ●        Proteus, the largest of the three, lacks the clays — possibly re-heated and reprocessed after re-forming, hiding its history. Sources: Davis et al., Science Advances, 29 July 2026  ·  Caltech / phys.org press coverage, 29 Jul–3 Aug 2026  ·  Space.com (Charles Q. Choi), 3 Aug 2026 ③ “Charbroiled within hours”: impact dust and the dinosaurs ●        New modelling (Brandon Johnson et al., Purdue) argues ultrafine impact dust from Chicxulub acted as an insulating blanket, raising surface heating ~3.5× above the spherule-only estimate — enough to ignite global wildfires and kill exposed animals within hours. ●        The same dust then blocked sunlight for years — so the model adds a ferocious opening act to the established “impact winter,” rather than replacing it. Sheltering underground or underwater aided survival. ●        Caveat: the strongest physical wildfire evidence is so far confined to North America (per UCL’s Alfio Chiarenza, not involved in the study); a truly global fire record remains unconfirmed. Sources: Johnson, Johnson, Wakita & Robertson, JGR: Biogeosciences, 2026  ·  Popular Science / Space.com / ZME Science, 28 Jul–2 Aug 2026 ④ eROSITA DR2 — the X-ray sky doubles ●        The eROSITA telescope (SRG mission) released its second data set (DR2) on 31 July 2026: ~1.9 million pointlike and ~64,000 extended X-ray sources from the first three all-sky scans — nearly doubling the previously released eROSITA catalogue. ●        For scale: ROSAT catalogued ~130,000 sources in the 1990s and was the benchmark for 30 years. Lead author: Miriam Ramos-Ceja (MPE). ●        DR2 delivers the first direct census of cataclysmic-variable binaries sufficient to explain the decades-old Galactic Ridge X-ray Emission. It coincides with SDSS DR20 (Black Hole Mapper), enabling 3D mapping of active black holes. Sources: Ramos-Ceja et al. (eROSITA-DE), arXiv:2607.27772; DR2 release  ·  Max Planck Society press release, 29 July 2026  ·  phys.org, 31 Jul 2026 Skywatch — both hemispheres ●        Falcon 9 impact (5 Aug, ~06:35 UTC): not naked-eye; ejecta plume a long shot for advanced amateurs in the Americas near the western limb (~2:35 a.m. EDT). Sydney: Moon below horizon — watch for LRO after-images. ●        Comet 10P/Tempel 2: perihelion 2 Aug, closest to Earth 3 Aug (~0.41 AU); ~mag 8–9 near M30 in Capricornus. Best return of the century; Southern-Hemisphere-favoured; Northern viewers low on the southern horizon. Darkest window ~7–8 Aug. ●        This evening: Venus threads between Regulus (Leo) and Spica (Virgo) in the west — both hemispheres, no equipment. Mercury at its best morning showing (greatest western elongation 2 Aug), low in the pre-dawn east. ●        Diary — 12 Aug: total solar eclipse (Greenland/Iceland/Spain), moonless Perseid peak, six-planet alignment. Always use certified ISO 12312-2 eclipse glasses / solar filters except during totality.

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Astronomy Daily · S05E157 · “The Edge of Everything” · Monday 3 August 2026 
In this episode •      The largest galaxy, measured at last. Ultra-deep imaging of IC 1101 in the Abell 2029 cluster has traced its outer edge for the first time: an edge radius of ~260 kpc, a diameter near 520 kpc (~1.7 million light-years), and ~3.4 trillion solar masses in stars — about 17× the width of the Milky Way. Faint outer structures aligned with cluster X-ray disturbances show it is still accreting. Source: Marrero-de la Rosa et al., “How large can galaxies be? Ultra-deep imaging of IC 1101”, accepted A&A (arXiv:2607.15340, 16 Jul 2026); phys.org, 31 Jul 2026; The Debrief, 1 Aug 2026. •      Hayabusa2's record asteroid flyby. JAXA confirmed (press conference 30 Jul) that its Hayabusa2 probe passed just 400 m from the surface of near-Earth asteroid Torifune on 5 July — 744 m from centre at >18,000 km/h — the closest asteroid flyby by any mission, plus the first-ever laser ranging of an asteroid during a flyby. Torifune proved to be a contact binary. Source: JAXA press conference, 30 Jul 2026; phys.org / Japan Today (AFP), 31 Jul 2026; autoevolution, 1 Aug 2026. •      UK's first orbital launch on hold. Rocket Factory Augsburg de-stacked its RFA One at SaxaVord Spaceport (Unst, Shetland) after finding a vehicle issue during hot-fire test prep (announced 28 Jul). The certified launch window opens 10 August; a successful flight would be the first orbital launch from UK soil. Source: RFA statement (X), 28 Jul 2026; Space.com, 1 Aug 2026; Shetland Times, 28 Jul 2026. •      Andromeda is winding down. A new Hubble study mapping ~200 million stars across two-thirds of Andromeda's disk finds star formation has declined over ~500 million years (from ~1 to ~0.2 solar masses/year), with the steepest drop in the last 40 million years — possibly linked to an interaction with satellite galaxy M32. Source: Williams et al., The Astrophysical Journal, 27 Jul 2026; NASA/STScI release, 27 Jul 2026. Skywatch — both hemispheres •      Comet 10P/Tempel 2 — perihelion 2 Aug; closest approach to Earth tonight (3 Aug). Binoculars/small scope, dark skies. Best pre-dawn from the Southern Hemisphere; ~9:30–10:30 pm local for mid-northern latitudes before moonrise. •      Moon near Saturn tonight (3 Aug) — naked-eye pairing, both hemispheres, up into dawn. •      Mercury at greatest western elongation (2 Aug) — low eastern horizon ~1 hr before sunrise, toward Gemini; Mars higher. Better placed for northern observers. •      Diary (2 days out): Falcon 9 upper stage (2025-010D) lunar impact near Einstein Crater, 5 Aug ~06:35 UTC — ~2:35 am EDT / 11:35 pm PDT (4 Aug); North America best-timed on the dark limb. Southern Hemisphere: ~4:35 pm AEST (daylight) — await orbiter after-images. •      Looking ahead: 12 Aug total solar eclipse (Greenland/Iceland/Spain) + moonless Perseid peak + six-planet dawn alignment. View partial phases only through certified ISO 12312-2 filters. Links & follow •      Website, back catalogue, news feed & newsletter: astronomydaily.io •      Social: @AstroDailyPod  ·  Part of the Bitesz.com Podcast Network

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Astronomy Daily S05E156 — Weekend Space & Astronomy News Wrap. Saturday, 1 August 2026. In this episode •    The first “self-driving” telescope — a SkAI deep-learning system (Northwestern / UChicago / Fermilab) schedules and re-plans observations in real time on the Dark Energy Camera at the Blanco 4-m, Cerro Tololo, Chile — matching human schedulers across two runs. •    Betelgeuse's companion imaged — ESO's VLT delivers the clearest view yet of likely “Betelgeuse B,” ending a century-long search (recap, E153). •    (44) Nysa — first known three-lobed (trilobate) asteroid, plus a ~1 km moon, from LBT + VLT high-contrast imaging (recap, E155). •    A black hole's 300,000-light-year reach — XRISM traces quasar-driven winds from H1821+643 reshaping an entire galaxy cluster (recap, E154). •    August skywatch — Comet 10P/Tempel 2 at perihelion (2 Aug); total solar eclipse crossing Greenland, Iceland, Spain & Portugal (12 Aug) paired with a moonless Perseid peak (12–13 Aug); a six-planet line-up through the month.   Sources •    SkAI / self-driving telescope: Northwestern University news release, 31 July 2026; phys.org, 31 July 2026 (Blanco 4-m / DECam / Cerro Tololo). •    Betelgeuse companion: ESO / VLT; Montargès et al., Astronomy & Astrophysics (covered in E153). •    (44) Nysa: Large Binocular Telescope (SHARK-VIS) + VLT high-contrast imaging; Lowell Observatory release (covered in E155). •    Black-hole feedback: XRISM observations of quasar H1821+643 (covered in E154). •    Skywatch: timeanddate.com and Space.com August 2026 sky guides; Royal Observatory Greenwich 2026 highlights (eclipse path and Perseid peak details).   astronomydaily.io · @AstroDailyPod · Part of the Bitesz.com Podcast Network

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S05E155 · Friday 31 July 2026 · Astronomy Daily with Anna & Avery. Four stories and a both-hemispheres skywatch. Australian English. ① Asteroid (44) Nysa — the first three-lobed world, and its hidden moon ●        trilobate body — three lobes joined by two narrow necks; a candidate “first” of its kind. ●        A new ~1 km moon, S/2026 (44) 1, was found orbiting ≥170 km out — spotted using high-contrast imaging borrowed from exoplanet work, and confirmed moving across two observing runs. ●        The moon lets astronomers weigh Nysa (mass → density), which should help decide between a genuine contact-trinary and a single, deeply indented body. ●        Nysa is a bright, main-belt E-type (enstatite-rich) asteroid, ~75 km across, known since 1857. ●        Source: Lowell Observatory / University of Arizona press release, 29 Jul 2026; study “Unmasking (44) Nysa: Evidence for a Trilobate Structure” (Minker et al.). Coverage: Space.com, Gizmodo, 29–30 Jul 2026. ② Mapping Alien Continents — a NASA concept to image an exoplanet’s surface ●        NASA’s 2026 NIAC round funds 18 early-stage “visionary” concepts (~$175k each, 9 months). These are seed studies, not missions. ●        Paul Stankus (Brookhaven) proposes “Mapping Alien Continents”: resolve the surface of an Earth-like exoplanet — continents, oceans — in visible light. ●        Method: a novel “dynamic hierarchical nulling” interferometer to suppress starlight at 10¹⁰-to-1 contrast, then combine beams from two spacecraft ~100 km apart (optical VLBI-style imaging). ●        Source: NASA “2026 Innovative Technology Concepts” release and NIAC selections (posted 21 Jul; consolidated release ~29 Jul 2026); Universe Today feature, 30 Jul 2026. ③ Solar-storm watch — CMEs inbound, minor-storm and aurora potential ●        Two faint coronal mass ejections, plus coronal-hole solar wind, are set to give Earth glancing blows; forecasters flag possible G1 (minor) geomagnetic storms and auroras over the coming days. ●        G1 means little grid impact but aurora visible at somewhat lower latitudes than usual — see the skywatch for where to look, both hemispheres. ●        Source: NOAA SWPC (WSA-ENLIL model); EarthSky / The Sun Today, 30 Jul 2026. ④ ESCAPADE’s family portrait of Earth and the Moon ●        NASA’s twin Mars orbiters (“Blue” and “Gold,” built by Rocket Lab) imaged Earth and the Moon as thin crescents in visible and thermal-infrared light from a loiter orbit near Sun–Earth L2. ●        In infrared, Earth’s night side glows with its own heat; the Moon’s shadowed half is far colder — a calibration check before Mars. ●        ESCAPADE’s science goal (arrival Sept 2027): measure how the solar wind strips Mars’s unshielded atmosphere — the payoff of today’s solar-wind thread. ●        Source: NASA (Goddard) image feature, ~25 Jul 2026 (images captured 3 Jul); NAU / phys.org; Universe Today, 29 Jul 2026. Skywatch — both hemispheres ●        Bright waning-gibbous Moon (post-Buck-Moon, 29 Jul) washes out faint targets. ●        Southern Delta Aquariids + Alpha Capricornids just past peak (SH-favoured; Moon-hampered). Perseids build to a near-moonless peak on the night of 12–13 Aug — prime for North America, low in the north for the SH. ●        12 Aug total solar eclipse: totality across Greenland / Iceland / Spain; partial for parts of northern North America and Europe. ISO 12312-2 eye protection required for any partial phase. ●        Pre-dawn planets low in the east (Sydney and North American framing). Aurora watch for high latitudes both hemispheres if the storms land. ●        Diary: a spent Falcon 9 upper stage (2025-010D) is predicted to hit the Moon near Einstein Crater on 5 Aug 2026, ~06:35 UTC (~2:34 a.m. ET). North America best-timed; telescope needed, Moon ~56% lit, target the limb dust plume. From Sydney the Moon is down at impact — rely on LRO after-images. Callback to E125/E147. Source: Fernando et al., arXiv 2607.14625.

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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.

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