軌道デブリ

A US start-up's bid to "sell sunlight after dark" by beaming reflected sunlight from thousands of orbital mirrors has prompted formal objections from astronomers and observatories… 3月 17, 2026

NASA's Van Allen Probe A plunged back into Earth's atmosphere this week years earlier than planned after solar-driven drag accelerated its decay. Officials say most of the 1,323-p… 3月 13, 2026

NASA warns that the 1,300-pound Van Allen Probe A is expected to re-enter Earth's atmosphere today after intensified solar activity accelerated its orbital decay. The agency says … 3月 11, 2026

A Marietta startup says its composite 'Space Armor' tiles will protect satellites and astronauts from hypervelocity debris; an on‑orbit demonstration is scheduled for October 2026… 1月 16, 2026

A scientist's guide to the nine most credible, documented hazards of spaceflight — from vacuum exposure and radiation to fires, debris strikes and psychological collapse — and the… 1月 10, 2026

SpaceX says it will shift roughly 4,400 Starlink satellites from ~550 km to ~480 km in 2026 to reduce collision risk, speed up deorbiting of dead hardware, and ease growing traffi… 1月 03, 2026

A Long March-7A rocket placed Shijian-29A and 29B into orbit on 31 December 2025 to test space-target detection technologies. The mission continues China’s steady cadence of exper… 12月 31, 2025

As launches and constellations surge, broken satellites and fragments are crowding low Earth orbit. New research and agency reports lay out technical fixes, a circular economy app… 12月 09, 2025

China will send the damaged Shenzhou-20 return capsule back to Earth uncrewed for hands-on inspection after a suspected millimetre-scale debris strike cracked its window and force… 12月 03, 2025

After a suspected debris strike left a Shenzhou return capsule damaged, China conducted an improvised crew swap that returned one trio to Earth — but left the newly arrived crew t… 11月 18, 2025