Episodes

  • Cracking the Moon's Secrets: New Findings on Lunar Shrinkage

    Cracking the Moon's Secrets: New Findings on Lunar Shrinkage
    Oct 21 2026
    Show notes The Moon Is Still Shrinking Watters, Banks, Nypaver and Robinson (Planetary Science Journal, 14 Oct 2026) map more than 10,000 young thrust faults — ~8,900 lobate scarps and 2,000+ small mare ridges — with LRO's camera. Together they record about 42–46 m of radial contraction over the last ~400–800 million years, at most ~11 cm per million years. That's less than thermal models predict, pointing to a thick, porous, insulating megaregolith (or a strong elastic lithosphere) that delayed faulting. The ~4 MPa stress matches Apollo shallow-moonquake stress drops, so faults may still be growing today — relevant to siting lunar bases. A Soil Map for Mars University of Sydney PhD student Daniel Irving and Prof. Alex McBratney (Catena 275) classify almost 800 million Martian locations into 10 realms, 100 assemblages and 2,000 forms of 'areths', mapping 92% of the planet. Top candidate for plant growth, Nohibareth (score 0.93; ~72% clay, pH 6.8), covers 0.14% of the surface around Tharsis, Arabia Terra and Elysium. Candidates for study, not greenhouse sites; perchlorate and nitrogen not yet included. Euclid Finds Its First Comet ESA's Euclid discovered C/2026 S1 (Euclid) in Deep Field North images from 16–24 September, flagged by Mikko Pöntinen's moving-object software and confirmed by the Minor Planet Center on 8 October. ~1.3 billion km away on a steep, thousands-of-years orbit. Uranus and Neptune: Cousins, Not Twins Briand, Hue, Mousis, Cavalié et al. (A&A 714, A364) use upper-tropospheric carbon monoxide, including ALMA data, to infer deep oxygen: Uranus ~47–177× protosolar, Neptune ~182–342×. Contrasting C/O ratios suggest Neptune's building blocks formed closer to the Sun. Accepted version online since late August. Quick hits MMX launched 04:41:03 JST 20 Oct on H3 F10; separation ~71 min 13 s; JAXA confirms the spacecraft is operating normally. Roman's Wide Field Instrument focused to 63 nm RMS against ~90 nm required. Artemis II heat shield: 9 char-loss spots vs 103 on Artemis I. Hera's BRM-2 burn Thursday 22 October. Skywatch Orionids peak 21–22 Oct — watch between moonset and dawn (moonset Thu morning: 03:38 Sydney, 03:22 LA, 03:12 NY, 02:49 London). Mercury 16.5° up at civil dusk from Sydney. Venus at inferior conjunction ~24 Oct. Moon ~6° from Saturn 24 Oct. Full Moon 26 Oct 04:11 UTC. UK clocks go back 25 Oct, US on 1 Nov. Always use ISO 12312-2 certified filters for any solar viewing. Sources · Watters et al. — Thrust Faulting and the Late-stage Contraction of the Moon (PSJ, 14 Oct 2026) — https://doi.org/10.3847/PSJ/ae9eae · Smithsonian NASM — New Study Reveals How Much the Moon Is Shrinking — https://airandspace.si.edu/newsroom/press-releases/new-study-reveals-how-much-moon-shrinking · University of Sydney — Sydney student creates first map of Martian soils — https://www.sydney.edu.au/news-opinion/news/2026/10/16/sydney-student-creates-first-map-of-martian-soils.html · McBratney, Irving et al. — Areths and PPACS (Catena 275) — https://doi.org/10.1016/j.catena.2026.110649 · ESA — Euclid discovers new comet — https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_discovers_new_comet · SwRI — New ideas about origins of Uranus, Neptune — https://www.swri.org/newsroom/press-releases/swri-staff-contribute-new-ideas-about-origins-of-uranus-neptune · Briand et al. — Contrasting C/O ratios in Uranus and Neptune (A&A 714, A364) — https://doi.org/10.1051/0004-6361/202660770 · JAXA — Launch result of MMX aboard H3 F10 — https://global.jaxa.jp/press/2026/10/20261020-1_e.html · NASA — Roman team checks out main instrument, sharpens focus — https://science.nasa.gov/missions/roman-space-telescope/ · NASA — Rigorous analysis confirms Artemis II heat shield performance — https://www.nasa.gov/missions/artemis/artemis-2/rigorous-analysis-confirms-nasas-artemis-ii-heat-shield-performance/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.
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    22 mins
  • A Round Trip to Phobos Underway

    A Round Trip to Phobos Underway
    Oct 20 2026
    MMX: A Round Trip to Phobos JAXA's Martian Moons eXploration mission launched on schedule on H3 Flight No. 10 at 04:41:03 JST on 20 October 2026 (19:41 UTC 19 Oct; 06:41 AEDT Tue; 15:41 EDT / 12:41 PDT / 20:41 BST Mon). Mars orbit August 2027, Phobos quasi-satellite orbit from September 2027, Idefix rover (CNES/DLR) release early 2029, landing and sampling 2030, and at least 10 g of Phobos returned in 2031 to South Australia. Eleven science instruments including NASA's MEGANE. The aim: settle whether Phobos and Deimos are captured asteroids or debris from a giant impact on Mars. Half a Giant Mirror ESO reports that nearly 500 of the ELT's primary-mirror segments are now at Paranal — more than half of the 931 being made (798 plus 133 spares for continual recoating). Safran Reosc is finishing a segment a day and the last one is in production. The ELT is more than 75% complete, with first observations with scientific instruments planned for late 2030. The Window That Closes Carr, Cen and colleagues (Nature Astronomy, 15 Oct 2026) used Hubble/COS spectra of six matched local starbursts to show ionising light escapes most in the first few million years, before supernova-driven winds load the outflow with neutral gas and shut it down. Escape fractions fall from ~21% (mean age ~2.7 Myr) to under 0.4% (~5.4 Myr). Preprint first posted October 2025. The Treble Clef Rises Again Botteon et al. (A&A; NASA/Chandra release 14 Oct) show VLSS J0318.9+5755, behind the Milky Way's plane, is a radio phoenix in a merging cluster at z ≈ 0.117: an old black-hole outburst re-lit by a cluster collision a few hundred million years ago. Spectral index above 4 between 400 and 650 MHz; electrons ~190–200 Myr old. Preprint from July. Quick hits Hera's 93-minute BRM-1 confirmed within parameters; BRM-2 on Thursday 22 October. Sentinel-3C's first images and altimetry. Swift: no NASA re-entry date yet. Skywatch Full Moon 26 Oct 04:11 UTC. Orionids peak 21–22 Oct: go after moonset (03:38 Sydney, 03:22 LA, 03:12 NY, 02:49 London on the 22nd). Mercury 17° up at civil dusk from Sydney (21 Oct). Venus inferior conjunction ~24 Oct. Moon ~6° from Saturn ~24 Oct. Mars–Jupiter 10.8° → 8.0° pre-dawn. Always use ISO 12312-2 certified filters for any solar viewing. Sources · JAXA — MMX launch on H3 F10 — https://mmx-news.isas.jaxa.jp/?p=2753 · ESA — Mars moon lander set to launch on 19 October — https://www.esa.int/Science_Exploration/Space_Science/Mars_moon_lander_set_to_launch_on_19_October · Australian Space Agency — MMX sample return — https://www.space.gov.au/node/950 · ESO ann26009 — More than half of the ELT's giant mirror is now in Chile — https://www.eso.org/public/announcements/ann26009/ · Carr et al. — arXiv 2510.21197 (Nature Astronomy, 15 Oct 2026) — https://arxiv.org/abs/2510.21197 · NASA — Chandra breaks down Treble Clef's galaxy cluster collision — https://science.nasa.gov/missions/chandra/nasas-chandra-breaks-down-treble-clefs-galaxy-cluster-collision/ · Botteon et al. — arXiv 2607.06659 — https://arxiv.org/abs/2607.06659 · ESA — Sentinel-3C returns its first views of Earth — https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-3/Sentinel-3C_returns_its_first_views_of_Earth · ESA Hera on X — BRM-1 confirmed — https://x.com/ESA_Hera · NASA — Lessons learned from the Swift boost mission — https://science.nasa.gov/missions/swift/nasa-highlights-lessons-learned-from-swift-boost-mission/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.
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    24 mins
  • Time's Tipping Point: The End of Leap Seconds and a Lunar Clock Revolution

    Time's Tipping Point: The End of Leap Seconds and a Lunar Clock Revolution
    Oct 18 2026
    Show notes Time Lets Go of the Sky On 15 October 2026 the 28th General Conference on Weights and Measures in Versailles adopted Resolution 5: UTC becomes continuous on 20 May 2027, ending leap seconds, with the UTC–UT1 gap allowed to reach one hour. The driver: a growing chance (about 30% by 2035) of a first-ever negative leap second. Resolution 6 starts work on an international lunar reference time scale traceable to UTC; Resolution 4 prepares an optical-clock redefinition of the second for 2030. Earth's rotation (UT1) is still measured — by VLBI, with Australia's AuScope dishes part of the network. The Week That Was WISE 0855's changing water clouds (JWST); Hera's 93-minute braking burn; Artemis II's five lunar impact flashes; UCL questions the chemical evidence for hypernovae; the Arsia Mons cloud needs ice from nothing; the first green star. Also: ZTF J0440+2325, Meteor 2-7, Juno's crumpled magnetodisk, WASP-17 b, two planetary families, and new Magellanic Cloud pulsars from the Parkes archive. Skywatch First quarter Mon 19 Oct 03:12 AEDT (16:12 UTC Sun). Mercury 24° up at sunset from Sydney vs 10° LA, 7° NY, 3° London. Venus gone from northern evening skies; inferior conjunction ~03:00 UTC Sat 24 Oct. Saturn all evening, rings ~7° open. Orionids peak 21–22 Oct; Moon sets ~03:00–03:40 local, radiant 39–70° up at 04:30. Mars–Jupiter 11.5° apart, 1.2° on 16 Nov. AR4551 beta-gamma-delta. Solar safety: ISO 12312-2 filters only. Sources · BIPM — Resolutions adopted at the 28th CGPM: https://www.bipm.org/en/-/cgpm-2026-resolutions-adopted · BIPM — Resolution 5 (2026): https://www.bipm.org/en/cgpm-2026/resolution-5 · BIPM — Statement by the CCTF President, 15 Oct 2026: https://www.bipm.org/documents/d/guest/statement-cctf-president-cgpm-2026 · AuScope VLBI array (Lovell et al.): https://arxiv.org/abs/1304.3213 · ESA — Braking news! Hera: https://www.esa.int/Space_Safety/Hera/Braking_news!_Time_for_ESA_s_Hera_asteroid_mission_to_go_slow · JAXA — MMX launch schedule: https://global.jaxa.jp/press/2026/08/20260820-1_e.html · EarthSky — Sun news, AR4551 (16 Oct): https://earthsky.org/sun/sun-news-activity-solar-flare-cme-aurora-updates/ · Week That Was sources: see S05E202–S05E206 show notes.

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    22 mins
  • Stellar Breakthroughs: The Discovery of Deuterated Methanol and the First Green Star

    Stellar Breakthroughs: The Discovery of Deuterated Methanol and the First Green Star
    Oct 17 2026
    Show notes Episode 206 opens with the first results from ALMA's COMPASS survey: the first detection anywhere in interstellar space of fully deuterated methanol, and methanol masers turning up around more than half of a sample of young Sun-like stars. Then the first star that would look green, Magellanic Cloud pulsars recovered from decades-old Parkes data, a supernova caught days old when the universe was 1.2 billion years old, quick hits on Hera, CRS-35 and MMX, and a both-hemispheres skywatch built around the Orionids. Heavy methanol around a newborn star ALMA's COMPASS programme (11 protostars, 100+ hours, seven A&A papers) reports the first interstellar CD3OD around IRAS 4A2 in Perseus (Belloche, MPIfR) and methanol masers in more than half of its low-mass protostars (Jeong, SNU). Deuterium fraction as a formation clock; current models can't reproduce the pattern. The first green star Warwick's Hollands et al. (RASTI) compute white dwarf colours from spectra: WD J1330+6435 comes out chartreuse thanks to accreted sodium; WD J1011+2845 may be the reddest star known. Of 151 white dwarfs within 20 pc, about 1 in 30 is oddly coloured, and the median is white. Pulsars hiding in the Parkes archive Reprocessing Murriyang's Magellanic Cloud surveys finds six pulsars, five in the LMC including a 3.8 s spinner (Sengar et al., preprint); a separate search finds PSR J0103−72, the slowest radio pulsar in the SMC (Wang & Sengar, preprint). A supernova caught days old JWST's NEXUS survey caught AT 2026abck at z = 5.017 roughly 4–10 rest-frame days after explosion — the first robust z ≳ 5 transient in an unlensed field (preprint; no spectrum yet). Quick hits Hera's BRM-1 braking burn (result pending at recording), CRS-35 docks with the last iROSAs, and MMX launches Tuesday morning Japan time. Skywatch First quarter 18 Oct, Orionids peak 21–22 Oct with the Moon down before dawn everywhere, evening Mercury for the south, Venus heading into conjunction, Saturn after dark, Mars and Jupiter closing before dawn. Sources · ALMA — Cosmic Cocktail: ALMA Reveals Exotic Methanol Around Young Stars (7 Oct 2026) — https://www.almaobservatory.org/en/press-releases/cosmic-cocktail-alma-reveals-exotic-methanol-around-young-stars/ · Belloche et al., COMPASS VII, arXiv 2610.07279 — https://arxiv.org/abs/2610.07279 · University of Warwick — true colours of white dwarf stars — https://warwick.ac.uk/news/pressreleases/astronomers-reveal-true-colours-of-white-dwarf-stars/ · Hollands et al., RASTI DOI 10.1093/rasti/rzag069 — https://academic.oup.com/rasti/article/doi/10.1093/rasti/rzag069 · Sengar et al., arXiv 2610.12450 — https://arxiv.org/abs/2610.12450 · Wang & Sengar, arXiv 2610.12143 — https://arxiv.org/abs/2610.12143 · Zhuang, Shen et al., arXiv 2609.38373 — https://arxiv.org/abs/2609.38373 · ESA — Brake! Time for ESA's Hera asteroid mission to go slow — https://www.esa.int/Space_Safety/Hera/Brake!_Time_for_ESA_s_Hera_asteroid_mission_to_go_slow · NASA Space Station blog — CRS-35 docking — https://www.nasa.gov/blogs/spacestation/ · JAXA — MMX launch schedule — https://global.jaxa.jp/press/2026/08/20260820-1_e.htmlBecome 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.
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    27 mins
  • Martian Mystery: Unveiling the Secrets of Arsia Mons' Elusive Clouds

    Martian Mystery: Unveiling the Secrets of Arsia Mons' Elusive Clouds
    Oct 16 2026
    Show notes A cloud on Mars that forms only if textbook-theoretical physics really happens; Webb maps a hot Jupiter's edge angle by angle; multi-planet systems turn out to come in two families tied to their stars; and the Sagittarius dwarf galaxy's original disc is rebuilt from its own debris. Plus Hera's first braking burn, the station's final solar arrays, NASA ADS hands over to SciX, and a both-hemispheres skywatch. The Cloud That Shouldn't Exist Every morning in Mars's southern spring and summer, the Arsia Mons Elongated Cloud stretches up to 1,800 km from the 20 km volcano and vanishes within the day. A team led by Jorge Hernández-Bernal (LMD/CNRS/Sorbonne Université) could only reproduce it by adding homogeneous nucleation, in which vapour freezes with no dust seed, at supersaturation more than 100,000 times everyday Earth levels. A model result: sufficient, not yet observed directly. Nature Geoscience, 7 October 2026. A Map Around a Hot Jupiter's Edge Using JWST's NIRISS, NIRSpec and MIRI and the transmission strings method, Lili Alderson, Hannah Wakeford and colleagues mapped WASP-17 b's limb in 20° steps: ~860 K at the morning edge, ~1,520 K at the evening edge, the largest limb contrast yet. Data from March 2023. Nature Astronomy, 14 October 2026. Planetary Systems Come in Two Families Diego Turrini (INAF), Camilla Danielski and colleagues find 298 well-measured multi-planet systems split into a calm, compact low-mass family and a heavyweight family around metal-rich stars with about ten times more dynamical excitation. Nature Astronomy, 13 October 2026. Rewinding a Shredded Galaxy Zixi Guo, Xiang-Xiang Xue (NAOC) and colleagues reproduce a vertical metallicity gradient across the Sagittarius streams only if the dwarf began as a disc with an inverted-V metallicity profile, seen in 3 of 217 MaNGA dwarfs. Nature Astronomy, 13 October 2026. Quick hit Hera's 93-minute braking burn (BRM-1); CRS-35 and the ISS's final roll-out solar arrays; NASA ADS closes in November and becomes SciX. Skywatch Mercury and Venus in the southern evening sky; Venus inferior conjunction 24 Oct; crescent Moon in Ophiuchus; Sagittarius and WASP-17 high from Australia; Saturn all night; Mars and Jupiter closing pre-dawn toward 1.2° on 16 Nov; Orionids peak 21–22 Oct. Links · ESA: Mars's oddest cloud may be even odder than we thought (7 Oct 2026): https://www.esa.int/Science_Exploration/Space_Science/Mars_Express/Mars_s_oddest_cloud_may_be_even_odder_than_we_thought · Hernández-Bernal et al., Nature Geoscience (2026), DOI 10.1038/s41561-026-02089-9: https://doi.org/10.1038/s41561-026-02089-9 · Preprint: arXiv 2609.37259: https://arxiv.org/abs/2609.37259 · Alderson et al., A spatial map of the atmospheric limb of a hot Jupiter, Nature Astronomy (2026): https://www.nature.com/articles/s41550-026-02986-4 · Turrini, Danielski et al., Two families of multi-planet systems, Nature Astronomy (2026): https://www.nature.com/articles/s41550-026-02990-8 · INAF Media: Due famiglie di sistemi planetari (13 Oct 2026): https://www.media.inaf.it/2026/10/13/famiglie-esopianeti-stella-madre/ · Guo, Xue et al., A ∧-like metallicity profile in the disk of the Sagittarius dwarf galaxy, Nature Astronomy (2026): https://www.nature.com/articles/s41550-026-02996-2 · ESA: Brake! Time for ESA's Hera asteroid mission to go slow (7 Oct 2026): https://www.esa.int/Space_Safety/Hera/Brake!_Time_for_ESA_s_Hera_asteroid_mission_to_go_slow · Spaceflight Now: CRS-35 launch (13 Oct 2026): https://spaceflightnow.com/?p=74541 · Nature Astronomy editorial: Farewell NASA ADS (12 Oct 2026): https://www.nature.com/articles/s41550-026-03009-y astronomydaily.io · @AstroDailyPod · Bitesz.com Podcast NetworkBecome 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.
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    25 mins
  • Cosmic Revelations: Artemis 2's Historic Observations and the Case of Hypernovae

    Cosmic Revelations: Artemis 2's Historic Observations and the Case of Hypernovae
    Oct 15 2026
    Show notes Six months after Artemis II swung around the far side of the Moon, NASA has published what the crew saw, said and sketched — including five faint impact flashes spotted during a 54-minute eclipse. Plus: two UCL papers that take apart the chemical evidence for hypernovae, Juno finds Jupiter's magnetodisk crumpled into ripples, and IISc simulations suggest magnetised white dwarfs could grow well past the Chandrasekhar limit. Skywatch: the crescent Moon meets Antares, Mercury and Venus favour the south, Mars leaves the Beehive, and Vesta at opposition. Artemis II Preliminary Lunar Science Report · Crew: Reid Wiseman, Victor Glover, Christina Koch (NASA) and Jeremy Hansen (CSA); lunar flyby 6 April 2026. · Five extremely faint impact flashes seen from ~74,000 km during a 54-minute eclipse behind the Moon; impactors estimated at no more than ~5 cm. · Crew-reported colours (blue = titanium-rich volcanic rock, brown = iron, green = glass); terminator observations as a proxy for south-pole lighting. · 'Hello, World' Earth image lit by moonlight; labelled southern Milky Way image (Crux, Carina, LMC). · Source: NASA Science, 'Artemis II: Sights & Sounds of Science', 7 Oct 2026 — science.nasa.gov/feature/artemis-ii-preliminary-lunar-science-report/ Hypernovae: the evidence that wasn't · Anmol Aggarwal & Ralph Schoenrich (Mullard Space Science Laboratory, UCL), two MNRAS papers; UCL release 5 Oct 2026. · Uneven ('stochastic') supernova enrichment explains three of four supposed hypernova-enriched stars; the fourth (silver- and uranium-rich halo giant) fits a neutron-star merger plus one ordinary supernova. · Source: ucl.ac.uk/news/2026/oct/ultra-powerful-star-explosions-might-not-have-occurred-after-all ; DOI 10.1093/mnras/stag610 Juno: Jupiter's rippling magnetodisk · Ruilong Guo (Shandong University) et al., Science China Earth Sciences 69(10), 2026; release 6 Oct 2026. · Repeated current-sheet crossings — four in ten minutes in one case — with reconnection signatures; a rotating, rippled sheet rather than a smooth flapping one. · Source: doi.org/10.1007/s11430-025-1870-9 White dwarfs beyond the Chandrasekhar limit · Zenia Zuraiq, Banibrata Mukhopadhyay (IISc) and collaborators incl. Christopher Tout, ApJL 2026; IISc release 9 Oct 2026. · Modified STARS code: a magnetised accreting white dwarf reaches ~2.4 solar masses vs ~1.4 without the field. · Source: iisc.ac.in/events/strong-magnetic-fields-could-allow-white-dwarfs-to-grow-beyond-the-chandrasekhar-limit/ Quick hit: Hera and MMX · ESA: Hera BRM-1, 93-minute braking burn early Thu 15 Oct; BRM-2 on 22 Oct. esa.int (Hera) · JAXA: MMX launch on H3 F10, 20 Oct 2026 04:41:03 JST from Tanegashima; samples to South Australia in 2031. Skywatch (computed for Sydney, LA, New York, London) · Tonight: crescent Moon near Antares — 1.3° from New York, 2.3° from LA and London (very low), 7° from Sydney. · Evening Mercury (24° up at sunset from Sydney) and Venus (heading to inferior conjunction ~24 Oct) favour the south. · Pre-dawn: Mars ~2° from the Beehive, Mars–Jupiter closing to ~1.2° on 16 Nov; Saturn in the evening; Southern Taurids; Vesta at opposition (mag 6.5, Cetus). · Solar safety: never view the Sun except through certified ISO 12312-2 filters.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.
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    25 mins
  • HERA's Grand Maneuver: Braking for Didymos and the Future of Planetary Defence

    HERA's Grand Maneuver: Braking for Didymos and the Future of Planetary Defence
    Oct 14 2026
    Show notes Hera Hits the Brakes ESA's Hera spotted its target asteroid for the first time last week and fires its first braking burn on Thursday — 93 minutes of thrust to start stopping at Didymos and Dimorphos, the asteroid pair NASA's DART hit in 2022. Plus: Solar Orbiter traces a solar-wind switchback back to the Sun, Gemini North finds chains of giant knots in the remnant of the supernova of 1181, Webb reads the dust of Mars-sized worlds colliding, and Perseverance becomes the farthest-driving vehicle on another world. In the skywatch: the Moon meets Antares, Venus bows out, Mars and Jupiter rule the northern dawn, and the Orionids are a week away. Hera Hits the Brakes Two years after launch, Hera caught its first glimpse of Didymos from about 236,500 km away — a sub-pixel dot. On Thursday 15 October three hydrazine thrusters fire for 93 minutes (BRM-1), taking a few hundred metres per second off its approach speed; BRM-2 (~31 min) follows on 22 October, then three small transition burns. The first signal after the burn comes through ESA's New Norcia antennas in Western Australia. Hera will measure the mass of Dimorphos so DART's single orbital-period result can become a repeatable deflection technique; its CubeSats Milani and Juventas will study dust, composition and the interior. Solar Orbiter traces a switchback home Coburn et al. (Nature Astronomy, 8 Oct) used heavy-ion charge states measured inside a large switchback crossed on 2 March 2022 to show it formed by interchange reconnection in hot closed loops at the Sun's surface — with waves and turbulence taking over once it left. Both leading theories are right, at different stages. The supernova of 1181 is strung with pearls Cunningham, Caiazzo et al. (ApJ, 6 Oct) used Gemini North/GMOS to show that Pa 30's radial filaments are chains of knots ~100 billion km across. Pa 30 is the Milky Way's only known Type Iax remnant, with a surviving 'zombie' star. The knots constrain models but don't yet settle what formed them. Webb reads the wreckage of colliding worlds Su et al. (ApJ, 1 Oct) studied 21 extreme debris disks with Webb and Spitzer. About a third are silica-rich, consistent with collisions between Mars-sized planetary embryos; older systems should be silica-poor. Quick hit: Perseverance's driving record On 11 October (sol 2,006) Perseverance reached 45.22 km, passing Opportunity's 45.16 km. More than 90% of the distance was driven on AutoNav. Sources · Hera braking campaign (ESA, 7 Oct 2026) — https://www.esa.int/Space_Safety/Hera/Brake!_Time_for_ESA_s_Hera_asteroid_mission_to_go_slow · Hera's first glimpse of Didymos (ESA, 7 Oct 2026) — https://www.esa.int/ESA_Multimedia/Images/2026/10/Destination_sighted_Hera_s_first_glimpse_of_Didymos · Finding Hera's way: Flight Dynamics team in action (ESA, 7 Oct 2026) — https://www.esa.int/Space_Safety/Hera/Finding_Hera_s_way_Flight_Dynamics_team_in_action · Solar Orbiter tracks origin of magnetic switchbacks (ESA, 8 Oct 2026) — https://www.esa.int/Science_Exploration/Space_Science/Solar_Orbiter/Solar_Orbiter_tracks_origin_of_mysterious_magnetic_switchbacks · Coburn et al., Nature Astronomy, DOI 10.1038/s41550-026-02928-0 — https://www.nature.com/articles/s41550-026-02928-0 · Gemini North reveals pearl-like knots in Pa 30 (NOIRLab, 6 Oct 2026) — https://noirlab.edu/public/news/noirlab2624/ · NASA's Webb provides crash course on planet-shattering collisions (NASA) — https://science.nasa.gov/missions/webb/nasas-webb-provides-crash-course-on-planet-shattering-collisions/ · Su et al., ApJ 1010:1, DOI 10.3847/1538-4357/ae88fe — https://doi.org/10.3847/1538-4357/ae88fe · Perseverance sets off-world record for total distance driven (JPL, 12 Oct 2026) — https://www.jpl.nasa.gov/news/nasas-perseverance-sets-off-world-record-for-total-distance-driven/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.
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    25 mins
  • A Nobel in Ice: Unveiling the Secrets of the IceCube Neutrino Observatory

    A Nobel in Ice: Unveiling the Secrets of the IceCube Neutrino Observatory
    Oct 9 2026
    Show notes We're back after a short break! Today: the 2026 Nobel Prize in Physics goes to Francis Halzen for the IceCube Neutrino Observatory — a cubic kilometre of Antarctic ice turned into a telescope. Then a Sydney-led team publishes the most distant fast radio burst yet, from a dwarf galaxy just 3 billion years after the big bang; Hubble's archive yields a possible second-generation planet around a white dwarf; and we catch up on Starship's first orbit, Crew-13, Juice's Earth flyby and the end of the LINK/Swift story. Skywatch: zodiacal light at both ends of the day, Mercury above Venus in southern twilight, and Mars in the Beehive for the north. Segment 1 — LEAD: The Telescope Made of Ice · Nobel Prize in Physics 2026 — nobelprize.org/prizes/physics/2026 (6 Oct 2026) · Royal Swedish Academy of Sciences press release, 6 Oct 2026 · AIP congratulations release, Newswise, 6 Oct 2026 · University of Wisconsin–Madison / IceCube background (via Interesting Engineering, 6 Oct 2026) Segment 2 — The Most Distant Fast Radio Burst · NASA: 'Webb Measures Distance to Farthest Fast Radio Burst, Suggesting Origin', 8 Oct 2026 · Caleb et al., Science, 8 Oct 2026, DOI 10.1126/science.adz2675 · Preprint: arXiv 2508.01648, 3 Aug 2025 (14-month gap disclosed) Segment 3 — A Planet Built From a Dead Star · NASA: 'Suspected Second-generation Planet Solves NASA Hubble Cold Case', 5 Oct 2026 · Williams et al., Nature Astronomy, 5 Oct 2026, DOI 10.1038/s41550-026-02983-7 · ESA/Hubble heic2613; poster, UK White Dwarf meeting, Durham, July 2025 (disclosed) Segment 4 — While We Were Away · SpaceX Starship Flight 14 overview (via leonarddavid.com, 29 Sept 2026) · NASA: 'NASA's SpaceX Crew-13 Launches', 1 Oct 2026 · ESA: 'Successful Earth flyby improves Juice's course to Jupiter', 28–30 Sept 2026 · AP (Marcia Dunn): 'Private spacecraft falls back to Earth...', 25 Sept 2026 · JAXA: MMX launch schedule aboard H3 F10, 20 Aug 2026 Segment 5 — Skywatch: Both Hemispheres · PyEphem 4.2.1 computations, Sydney / Los Angeles / New York / London · BBC Sky at Night: Vesta and Pallas at opposition, Oct 2026 · NASA: What's Up, October 2026

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    24 mins