Nasa telescope launched in 2004 to plunge back to Earth after failed rescue mission

Neil Gehrels Swift Observatory is expected to re-enter Earth’s atmosphere Wednesday, burning up in the process Nasa’s Neil Gehrels Swift Observatory, which has spent two decades studying the most powerful explosions in the cosmos, is expected to re-enter the Earth’s atmosphere on Wednesday, burning up in the process. The satellite, which was designed to operate with its three telescopes for just two years, is no longer able to steer or observe, and its re-entry is uncontrolled. Continue reading...

NASA的斯威夫特天文台在轨工作二十余年后失控，将于11月4日再入大气层，大部分部件将烧毁，残骸伤人风险约为1/2100。该望远镜曾追踪两千多个伽马射线暴，并观测到流浪超大质量黑洞撕裂恒星的事件。