Episode
Asteroid Flybys, Cosmic Mysteries, and the Search for the Universe's Ghost Signals
- Published
- Jul 6, 2026
- Duration seconds
- 677
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- http://www.astronomydaily.io
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Summary
Today on Astronomy Daily: Japan's Hayabusa2 pulls off a nail-biting high-speed asteroid flyby, James Webb finds the same unexplained chemical mystery on Titan AND Pluto, a neutrino detector may have caught the universe's oldest supernova echo, a wild new theory tries to solve the black hole information paradox, we wrap up the weekend's aurora action, and we look at when NASA's New Horizons might finally cross into interstellar space. 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 Bruno Bézard's team (Paris Observatory); posted to arXiv June 11, 2026 — not yet peer-reviewed. 3.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-Kamio…