{"ok":true,"trend":{"id":4323,"platform":"hn","region":"global","key":"astronomer watches starlink satellites sinking to build a 'planetary barometer'","title":"Astronomer watches Starlink satellites sinking to build a 'planetary barometer'","url":"https://www.theregister.com/science/2026/09/25/astronomer-watches-starlink-satellites-sinking-to-build-a-planetary-barometer/5299036","first_seen":"2026-09-26T17:31:54.363667Z","last_seen":"2026-09-26T22:51:34.741882Z","last_rank":4,"peak_rank":4,"last_volume":63,"peak_volume":63,"seen_count":5,"score":81.53,"category_hint":"science","section":"science","category":"science","summary":"An astronomer is tracking how Starlink satellites sink in their orbits, using the drift as a 'planetary barometer' to measure changes in Earth's upper atmosphere. Because the satellites' orbits respond to atmospheric drag, their gradual descent can act as a gauge of density variations. The idea is drawing attention among space and science readers interested in whether mega-constellations could double as atmospheric monitoring tools.","why":"The novel repurposing of Starlink's orbital decay for atmospheric science is striking and ties into ongoing debate about satellite mega-constellations.","tone":"neutral","entities":["Starlink","SpaceX","The Register"],"summarized_at":"2026-09-26T20:07:07.963395Z","meta":{"via":"scan","lang":"en","link":"https://www.theregister.com/science/2026/09/25/astronomer-watches-starlink-satellites-sinking-to-build-a-planetary-barometer/5299036","term":"science","comments":19},"nw":0.57,"promo":0.02,"kind":"news_event","importance":1.69,"hidden":false,"hide_reason":null,"judged_at":"2026-09-26T17:51:17.051727Z","title_en":"Astronomer turns falling Starlink satellites into a planetary barometer","section_name":"Science","category_name":"Science","timeline":[{"captured_at":"2026-09-26T17:31:54.363667Z","rank":4,"volume":62},{"captured_at":"2026-09-26T18:49:22.684903Z","rank":4,"volume":63},{"captured_at":"2026-09-26T20:07:48.328982Z","rank":4,"volume":63},{"captured_at":"2026-09-26T21:29:34.828307Z","rank":4,"volume":63},{"captured_at":"2026-09-26T22:51:34.741882Z","rank":4,"volume":63}],"posts":[{"platform":"hn","url":"https://news.ycombinator.com/item?id=49848227","author":"whh","title":"Astronomer watches Starlink satellites sinking to build a 'planetary barometer'","snippet":null,"posted_at":"2026-09-25T18:29:49Z","likes":63}],"elsewhere":[],"window":"7d"}}