Astronomy Daily: Latest Space News
The Evolving Enigma of Dark Energy and the Sun's Mysterious Past
An Australian-led team has rebuilt thirty years of supernova observations into one consistent catalogue — and it adds fresh weight to the idea that dark energy is not constant. We also ask whether the young Sun swallowed a super-Earth, find out why a quiet Sun is bad news at thirty-five thousand feet, and watch JWST run the most sensitive exomoon search ever attempted. Plus a Crew-13 update and a skywatch with a live aurora alert for both hemispheres. In this episode · Two thousand, eight hundred and eighty-four Type Ia supernovae, rebuilt from Pantheon+ and the Dark Energy Survey's full five-year sample into a single internally consistent catalogue by Ryan Camilleri and Professor Tamara Davis at the University of Queensland, with ANU, Swinburne and international colleagues. · On their own the supernovae give a matter density of 0.310 for flat ΛCDM. Combined with the CMB and baryon acoustic oscillations, a tension appears under constant dark energy — and eases when dark energy is allowed to evolve. Preference: 2.5–3.1 sigma. · Why that is interesting but not a discovery, and why a second independent line of evidence pointing the same way as DESI changes the shape of the argument. · Professor Mutlu Yildiz (Ege University) on whether the young Sun engulfed a planet of 5–10 Earth masses — and whether that single event explains both the solar sound-speed discrepancy and the Sun's missing lithium. · Yaniv, Yair and Price on six balloon flights to 35 km: cosmic radiation at cruising altitude runs 40–60% higher at solar minimum, with an anticorrelation of r = −0.71 against solar activity. · David Kipping stacks twelve JWST transits of LP 890-9c and excludes moons down to 0.1 Earth radii across the entire Hill region — the most sensitive exomoon search on record. · Crew-13 now targeting no earlier than late September after an oxidiser leak in Dragon's propulsion system. · Skywatch: a coronal-hole stream arriving today with aurora chances at both ends of the planet, Venus at greatest brilliancy on 18 September, Mars past Pollux, Saturn towards opposition, International Observe the Moon Night on the 19th, and the equinox on the 22nd. Sources · University of Queensland — 'Big supernova dataset challenges dark energy theory', 8 September 2026 · Camilleri, Lee, Davis, Rubin, Shah, Scolnic, Lidman et al., 'Supernovae Unite: Combining Pantheon+ and DES-SN5YR', Publications of the Astronomical Society of Australia — arXiv:2609.05053; companion host-mass paper arXiv:2609.05321 · Royal Astronomical Society — ''Fingerprints' inside the Sun could reveal if it once swallowed a planet', 10 September 2026. Yildiz, MNRAS, DOI 10.1093/mnras/stag1527 · Yaniv, Yair & Price, Journal of Geophysical Research: Atmospheres, September 2026 — cosmic radiation at aviation altitudes across the solar cycle · Kipping, 'JWST Excludes Exomoons Down to 0.1 Earth Radii Around a Rocky, Temperate Exoplanet', arXiv:2609.05301, 4 September 2026 · NASA Space Station blog — 'NASA, SpaceX Adjust Crew-13 Launch Date', 29 August 2026; Canadian Space Agency update, September 2026 · EarthSky sun news and NOAA Space Weather Prediction Center outlooks, 12–14 September 2026 · NASA Science — 'What's Up: September 2026 Skywatching Tips'
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Astronomy Daily: Latest Space News
Stellar Breakthroughs: The Discovery of Deuterated Methanol and the First Green Star
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.html 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/protonmail Become a supporter of Astronomy Daily by joining our Supporters Club. Commercial free episodes daily are only a click way... Click Here This episode includes AI-generated content.
Astronomy Daily: Latest Space News
Martian Mystery: Unveiling the Secrets of Arsia Mons' Elusive Clouds
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 Network 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/protonmail Become a supporter of Astronomy Daily by joining our Supporters Club. Commercial free episodes daily are only a click way... Click Here This episode includes AI-generated content.
Astronomy Daily: Latest Space News
Cosmic Revelations: Artemis 2's Historic Observations and the Case of Hypernovae
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/protonmail Become a supporter of Astronomy Daily by joining our Supporters Club. Commercial free episodes daily are only a click way... Click Here This episode includes AI-generated content.
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