2014 Year of Space Technology Benchmarks, Setbacks 2014年,太空标准检查技术遭遇挫折 WASHINGTON Space technology this year reached some important goals, culminating with the spectacular landing of a space probe on a comet, millions of kilo

发表于:2018-12-08 / 阅读(93) / 评论(0) 分类 VOA标准英语2014年(十二月)

NASA's Other Asteroid Mission: Grab A Chunk And Put It In Orbit Around The Moon play pause stop mute unmute max volume 00:0004:02repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or up

发表于:2019-01-16 / 阅读(116) / 评论(0) 分类 2016年NPR美国国家公共电台9月

You never guess the dangers on the ground from orbit, except maybe for this, massive, double-barreled storms hovering above the poles. Of this, what we called dipole features trailing around, we don't know what, really what they are, but the whole fe

发表于:2019-02-15 / 阅读(131) / 评论(0) 分类 自然百科2012年