最新研究显示，国际太空站（International Space Station, ISS）环境过于干净，竟可能导致太空人出现身体不适，甚至生病。 ▲国际太空站环境过于洁净，恐有导致太空人生病的风险。（图／路透） ...

导读SpaceX上周三推迟了将新一批宇航员送往国际空间站的计划，本次任务原本将为滞留太空的宇航员Butch Wilmore和Suni Williams返回家园铺平道路。美国航空航天局（NASA）和SpaceX表示，暂停发射的原因是用于支持飞行的地面设备出现了问题。以下是外媒报道。

NASA astronauts Suni Williams and Butch Wilmore, who have been stranded at the International Space Station since last June, started journey back to Earth aboard SpaceX's Dragon spacecraft early ...

LOS ANGELES, March 18 (Xinhua) -- NASA astronauts Suni Williams and Butch Wilmore, who had been stranded at the International Space Station (ISS) since last June, returned to Earth Tuesday afternoon.