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NASA“重力恢复与内部实验室”使命揭开月球的新面纱

(2013-11-18 10:48:55)
标签:

杂谈

分类: 科学与技术

http://photos.state.gov/libraries/amgov/3234/Week_2/11132013_GRAIL_600.jpg

2013.11.14

根据美国国家航空航天局(NASA)“重力恢复与内部实验室”(Gravity Recovery and Interior Laboratory)使命姊妹月球探测器提供的数据,世界各地的科学家们对月球美丽的表面为什么崎岖不平有了新的认识。

根据美国国家航空航天局(NASA)“重力恢复与内部实验室”(Gravity Recovery and Interior Laboratory)使命姊妹月球探测器提供的数据,世界各地的科学家们对月球美丽的表面为什么崎岖不平有了新的认识。一篇关于月球受撞击所形成的盆地的非对称分布的报告发表在最新的《科学》(Science)杂志上。

麻州理工学院(Massachusetts Institute of Technology)的首席GRAIL研究员玛丽亚•朱伯(Maria Zuber)说:“亘古至今,人类仰首问天,是什么造就了月球上的那个人。我们知道那些黑暗斑点是巨大的灌满了岩浆的盆地,那些盆地是大约40亿年前由小行星撞击形成的。GRAIL的数据表明,月球靠近我们的一面和远离我们的一面被同样巨大的撞击体撞击,但它们对撞击体的反应非常不同。”

图为探月使命的构想图,显示两艘GRAIL宇宙飞船正与地球进行通讯,并使用精确的编队飞行技术绘制月球的重力场。月球上的颜色代表重力场强度。GRAIL使命在2012年用9个月的时间,以前所未有的详细程度测量了月球的内部结构。

有关研究人员通过GRAIL使命了解的详细情况见NASA的新闻公告



Read more: http://iipdigital.usembassy.gov/st/chinese/inbrief/2013/11/20131114286806.html#ixzz2kxgiGqOT

NASA’s GRAIL Mission Puts New Face on Moon

http://photos.state.gov/libraries/amgov/3234/Week_2/11132013_GRAIL_600.jpg

13 November 2013

Scientists around the world using data from the lunar-orbiting twins of NASA’s GRAIL mission are gaining new insight into how the face of the moon received its rugged good looks.

Scientists around the world using data from the lunar-orbiting twins of NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission are gaining new insight into how the face of the moon received its rugged good looks. A report on the asymmetric distribution of lunar impact basins is published in the current edition of the journal Science.

“Since time immemorial, humanity has looked up and wondered what made the man in the moon,” said Maria Zuber, GRAIL principal investigator from the Massachusetts Institute of Technology. “We know the dark splotches are large, lava-filled impact basins that were created by asteroid impacts about 4 billion years ago. GRAIL data indicate that both the near side and the far side of the moon were bombarded by similarly large impactors, but they reacted to them much differently.”

The artist’s conception above shows the two GRAIL spacecraft communicating with Earth and using their precision formation-flying technique to map the moon’s gravity field. The colors on the moon represent gravitational strength. The GRAIL mission measured the internal structure of the moon in unprecedented detail for nine months in 2012.

For more on what researchers are learning from GRAIL, see the NASA press release.



Read more: http://iipdigital.usembassy.gov/st/english/inbrief/2013/11/20131113286646.html#ixzz2kxgkfnvR

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