女性太空人威廉斯30日在国际太空站外工作 。（美联社） 被困在国际太空站(International Space Station)八个月的两名太空人，30日首次结伴出舱进行太空漫步，拆除破损的天线，顺便采得太空站外的灰尘样本，检验是否含有微生物。

Scientists researching Alpine glaciers store ice in Antarctica. By analysing air bubbles in the ice they may be able to predict the future ...

"NASA and SpaceX are expeditiously working to safely return the agency's SpaceX Crew-9 astronauts Suni Williams and Butch ...