{"ok":true,"trend":{"id":707468,"platform":"hn","region":"global","key":"scientists explain how a 300 tev photon could reach earth","title":"Scientists explain how a 300 TeV photon could reach Earth","url":"https://physicsworld.com/a/scientists-explain-how-a-300-tev-photon-could-reach-earth/","first_seen":"2026-10-02T07:33:02.662954Z","last_seen":"2026-10-03T05:29:23.637882Z","last_rank":8,"peak_rank":5,"last_volume":8,"peak_volume":8,"seen_count":17,"score":74.81,"category_hint":"physics","section":"science","category":"physics","summary":"Physicists have detailed how a photon with an energy of 300 teraelectronvolts — far beyond anything produced in human accelerators — could have travelled to Earth. The explanation addresses how such an ultra-high-energy particle survived its journey across the cosmos without being destroyed by interactions with background light, a long-standing puzzle in high-energy astrophysics.","why":"The finding offers a rare glimpse of extreme cosmic acceleration mechanisms far beyond the reach of experiments on Earth.","tone":"neutral","entities":["Earth","physicists","300 TeV photon"],"summarized_at":"2026-10-03T01:39:29.741450Z","meta":{"via":"scan","lang":"en","link":"https://physicsworld.com/a/scientists-explain-how-a-300-tev-photon-could-reach-earth/","term":"physics","comments":1},"nw":null,"promo":null,"kind":null,"importance":null,"hidden":false,"hide_reason":null,"judged_at":null,"title_en":"Scientists explain how a 300 TeV photon reached Earth","section_name":"Science","category_name":"Physics","timeline":[{"captured_at":"2026-10-02T07:33:02.662954Z","rank":7,"volume":6},{"captured_at":"2026-10-02T08:55:44.202857Z","rank":8,"volume":6},{"captured_at":"2026-10-02T10:18:04.297138Z","rank":8,"volume":6},{"captured_at":"2026-10-02T11:40:04.308806Z","rank":9,"volume":6},{"captured_at":"2026-10-02T13:02:06.523790Z","rank":9,"volume":7},{"captured_at":"2026-10-02T14:24:25.842592Z","rank":9,"volume":7},{"captured_at":"2026-10-02T15:46:25.815280Z","rank":8,"volume":7},{"captured_at":"2026-10-02T17:08:25.833639Z","rank":8,"volume":8},{"captured_at":"2026-10-02T18:31:06.427394Z","rank":8,"volume":8},{"captured_at":"2026-10-02T19:53:06.336850Z","rank":8,"volume":8},{"captured_at":"2026-10-02T21:15:26.018212Z","rank":9,"volume":8},{"captured_at":"2026-10-02T22:37:26.016075Z","rank":8,"volume":8},{"captured_at":"2026-10-03T00:00:11.514890Z","rank":5,"volume":8},{"captured_at":"2026-10-03T01:22:44.339242Z","rank":9,"volume":8},{"captured_at":"2026-10-03T02:45:05.918477Z","rank":9,"volume":8},{"captured_at":"2026-10-03T04:07:23.084458Z","rank":9,"volume":8},{"captured_at":"2026-10-03T05:29:23.637882Z","rank":8,"volume":8}],"posts":[{"platform":"hn","url":"https://news.ycombinator.com/item?id=49929323","author":"EA-3167","title":"Scientists explain how a 300 TeV photon could reach Earth","snippet":null,"posted_at":"2026-10-02T02:36:46Z","likes":8}],"elsewhere":[{"id":464376,"platform":"news","region":"global","title":"Scientists explain how a 300 TeV photon could reach Earth","last_rank":18,"last_seen":"2026-09-30T15:46:53.153188Z","summary":"Researchers have offered an explanation for how a photon with an energy of 300 teraelectronvolts, one of the highest-energy photons ever detected, could have travelled to Earth. Such extreme gamma rays are expected to be absorbed or degraded over interstellar distances, so the finding has drawn attention from physicists discussing the mechanisms that could allow it to survive the journey and what it reveals about cosmic accelerators."}],"window":"7d"}}