加载中…泰坦卫星极地涡旋在黑暗中非常醒目
(2013-12-09 11:09:57)
标签：
杂谈 |
分类： 科学与技术 |
http://photos.state.gov/libraries/amgov/3234/Week_1/12032013_PIA17139_ip-600.jpg
泰坦（Titan）卫星南极极地涡旋被太阳光照亮的边缘，在背光的黑暗朦胧大气背景中非常醒目。“卡西尼号”（Cassini）航天器获取的涡旋图像使科学家断定，它的云层形成于比周围霾雾高得多的高度——阳光仍可照到。
泰坦卫星直径约为5150千米，是土星（Saturn）最大的卫星。卡西尼捕捉到这一景像时距泰坦卫星大约130万公里。
“卡西尼-惠更斯”使命（Cassini-Huygens mission）是美国国家航空航天局（NASA）、欧洲航天局（European Space Agency）和意大利航天局（Italian Space Agency）的合作项目。关于“卡西尼-惠更斯”使命的更多信息，请访问http://www.nasa.gov/cassini和http://saturn.jpl.nasa.gov。
Read more: http://iipdigital.usembassy.gov/st/chinese/inbrief/2013/12/20131206288567.html#ixzz2mwYzwnCj
Titan’s Polar Vortex Stands Out in Darkness
http://photos.state.gov/libraries/amgov/3234/Week_1/12032013_PIA17139_ip-600.jpg
The sunlit edge of Titan’s south polar vortex stands out distinctly against the darkness of the moon’s unilluminated hazy atmosphere. The Cassini spacecraft’s images of the vortex led scientists to conclude that its clouds form at a much higher altitude — where sunlight can still reach — than the surrounding haze.
Titan, about 5,150 kilometers across, is Saturn’s largest moon. Cassini was about 1.3 million kilometers from Titan when it caught this image.
The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. For more information about the Cassini-Huygens mission, visit http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov.
Read more: http://iipdigital.usembassy.gov/st/english/inbrief/2013/12/20131203288227.html#ixzz2mwZ1JDTr
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