NASA announced this afternoon that it plans to launch a tiny, four-pound, autonomous helicopter along with its 2020 rover mission. And if you think this sounds relatively cool, well: youre right.今天下午美国国家航空暨太空总署(NASA)白鱼送来微型、大约四磅（3.6斤）的无人直...
（原标题：SpaceX successfully launches 60 more satellites for its Starlink broadband internet constellation）1月7日消息，据外媒报导，美国太空探寻技术公司SpaceX刚顺利升空了第三批60颗太空互联网项目Starlink卫星。这些卫星配备猎鹰9号火箭升空升空，...