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軌工作二十余年後失控，將於11月4日再入大氣層，大部分部件將燒毀，殘骸傷人風險約為1/2100。該望遠鏡曾追蹤兩千多個伽馬射線暴，並觀測到流浪超大質量黑洞撕裂恆星的事件。