Monday, July 6, 2026 1. Hayabusa2's Flyby of Asteroid Torifune • JAXA's Hayabusa2 spacecraft flew within ~800 metres of near-Earth asteroid (98943) Torifune on July 5, 2026, at a relative speed of about 5.25 km/s (~18,000 km/h). • This is an extended-mission flyby, not a sample return — Hayabusa2 already delivered Ryugu samples to Earth in December 2020. • Purpose: engineering demonstration of high-precision navigation relevant to planetary defense (asteroid deflection technology). • Torifune is roughly 450 metres across. Next stop for Hayabusa2: rendezvous with asteroid 1998 KY26 in 2031. • Source: JAXA/ISAS, Nikkei Asia, phys.org (July 5, 2026). 2. Mystery Molecule Found on Both Titan and Pluto • James Webb Space Telescope data reveals an unexplained absorption feature at ~5.11 micrometres on the surfaces of Titan (Saturn's largest moon) and Pluto. • Evidence points to a surface origin rather than atmospheric origin, based on limb-vs-disc-center comparison on Titan. • Candidate compounds include allenes, but no confirmed identification yet. • Pluto's absorption line is roughly three times broader than Titan's at the same central wavelength. • Study led by Dr. Bruno Bézard's team (Paris Observatory); posted to arXiv June 11, 2026 — not yet peer-reviewed. 3. Super-Kamiokande's Hint of the Diffuse Supernova Neutrino Background • Super-Kamiokande collaboration presented results at Neutrino 2026 (UC Irvine) after analyzing ~5,000 days of data. • Found a statistically significant excess of events between 13.3–81.3 MeV — consistent with the long-predicted Diffuse Supernova Neutrino Background (DSNB). • Significance: 2.6-sigma (~99.5% confidence) — below the 5-sigma discovery threshold, so described as an 'indication,' not a confirmed detection. • If confirmed, DSNB would offer a new way to study the cosmic history of core-collapse supernovae via neutrinos rather than light. 4. A Theoretical Fix for the Black Hole Information Paradox • New theoretical study proposes black holes stop evaporating just before vanishing completely, leaving a stable Planck-scale remnant (~9×10⁻⁴¹ kg). • Mechanism: a repulsive force from spacetime torsion in a 7-dimensional Einstein-Cartan model, active at extreme (Planckian) densities. • Proposal: quantum information is preserved via long-lived 'vibrations' in the remnant's internal torsion field. • This is a theoretical/mathematical proposal, not an observational result. Researchers: Pinčák, Pigazzini, Pudlák, Bartoš. 5. Weekend Geomagnetic Storm / Aurora Wrap-Up • X1.1 solar flare (June 30) and associated CME triggered a G3 (strong) geomagnetic storm around July 3–4, 2026. • Aurora borealis visible as far south as Utah, Colorado, and Nevada in the continental US. • NOAA SWPC reports conditions easing to unsettled/G1 levels through July 6 as CME effects wane. 6. Forecasting New Horizons' Crossing Into Interstellar Space • SwRI researchers (lead: Dr. Jonathan Gasser) combined solar wind forecasting with heliosphere models to predict New Horizons' termination shock crossing. • Forecast window: 2029–2040, with possible multiple crossings as the heliosphere expands/contracts with the solar cycle. • New Horizons is currently ~66 AU from the Sun. Voyager 2 crossed its termination shock at 84 AU in 2007, with a 46% solar wind speed drop. • New Horizons would become only the third spacecraft (after Voyager 1 and 2) to cross this boundary. • Two papers: Advances in Space Research and The Astrophysical Journal (SwRI, 2026).
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