Tootfinder

A Physics Informed Neural Network for Deriving MHD State Vectors from Global Active Regions Observations: #SpaceWeather: https://www.swri.org/newsroom/press-releases/new-research-takes-first-step-toward-advance-warnings-of-space-weather

The Local Distance Network - A community consensus report on the measurement of the #HubbleConstant at ∼1% precision: https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202557993 - the result is 73.5 /-0.8 (essentially 74, as I've said for years :-) km/s/Mpc, in huge tension with the CMBR -> A community-built distance network sharpens the Hubble constant and broadens the evidence behind the “Hubble tension” / The Local Universe’s Expansion Rate Is Clearer Than Ever, but Still Doesn’t Add Up: https://www.issibern.ch/hubble-constant-press-release/ / https://noirlab.edu/public/news/noirlab2611/?lang

So there is an upcoming novel about #asteroid #2024YR4 which has just sold its movie rights: #TheLastOrbit eventually figure out that it's not only no risk for Earth anymore (as has been known for a year now, of course) but also not for the Moon. Talk about bad timing ... ;-)

The seismic diversity of four successive #SolarCycle minima as observed by the Birmingham Solar-Oscillations Network (BiSON): https://academic.oup.com/mnras/article/547/1/stag277/8472642 -> Forty years of data give unique insight into Sun’s inner life: https://www.birmingham.ac.uk/news/2026/forty-years-of-data-give-unique-insight-into-suns-inner-life - scientists reveal that even small differences in solar magnetic activity produce detectable changes inside the Sun.

A #Starlink satellite has exploded, kind of: according to https://nitter.net/LeoLabs_Space/status/2038680177408880719 a radar network has "detected tens of objects in the vicinity of the satellite after the event, with a first pass over our radar site in the Azores, Portugal. Additional fragments may have been produced — analysis is ongoing. We've characterized this event as likely caused by an internal energetic source rather than a collision with space debris or another object. Due to the low altitude of the event, fragments from this anomaly will likely de-orbit within a few weeks".

Multi-Sensor Trajectory Reconstruction of the 24 April 2025 Alaska #Fireball and Implications for Planetary Defense: https://arxiv.org/abs/2603.22630 -> "On 24 April 2025 at 18:30:57 UTC, a bright daytime fireball over Southcentral Alaska was detected by 37 seismic stations, 16 single infrasound sensors, and four infrasound arrays, yielding 30 ballistic and multiple fragmentation arrivals. The unprecedented density of seismoacoustic coverage enabled detailed reconstruction of the event using acoustic signals, with fragmentation source locations further guiding the identification of Doppler weather radar signatures of a meteorite fall. Incorporation of a radar-derived terminal point yielded a final trajectory solution, which agreed closely with an independent optical trajectory solution from video analysis. [...] This uniquely well-recorded event demonstrates the capability of dense seismoacoustic networks to constrain bolide trajectories, energetics, and fragmentation, with radar and optical data providing critical confirmation and complementary perspectives."