加载中…黎明号为观测小行星助一臂之力
(2013-10-17 15:39:10)
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杂谈 |
分类： 科学与技术 |
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美国国家航空航天局（NASA）哈勃太空望远镜（Hubble Space Telescope）发回的图像以及地面数据引起科学家们浓厚的兴趣。他们认为巨型小行星灶神星（Vesta）值得更仔细的研究。2011年和2012年美国国家航空航天局的黎明号太空船（Dawn）绕这颗巨型行星运行时，他们得到了这样一个机会，并且能够核对早期结论。一项新的研究表明，通过黎明号在那段时期进行的观测，结合哈勃望远镜和地面望远镜的观测数据，有助于人们加深对太阳系天体的理解。
研究结果最近发表在《伊卡洛斯》（Icarus）期刊上。论文的主要作者维什努·瑞迪（Vishnu Reddy）说，“对绝大部分行星的研究只能通过地面和太空设备进行远程观测，因此采取实地测量的方法核实观测的准确性对于我们探索太阳系意义重大。瑞迪的工作基地是亚利桑那州（Arizona）图森（Tucson）的行星科学研究所和德国凯伦堡-林道（Katlenburg-Lindau）的马克斯‧普朗克太阳系研究所（Max Planck Institute for Solar System Research）。
在这篇论文中，瑞迪与黎明号分幅摄像机小组的其他成员介绍了近距离观察灶神星（上图）的情况，为200多年来从地球上进行的观测提供了佐证和新的视角。
2007年发射升空的黎明号绕灶神星运行了一年多，于2012年9月离开灶神星，如今正前往矮行星谷神星（Ceres)，预计2015年初到达那里。
“黎明号“的分幅摄像机由德国凯伦堡-林道（Katlenburg-Lindau）的马克斯‧普朗克太阳系研究所（Max Planck
Institute for Solar System Research）主持研制，柏林的德国航空太空中心行星研究所（DLR
German Aerospace Center, Institute of Planetary
Research）做出了巨大的贡献，同时得到不伦瑞克（Braunschweig）的计算机与通讯网络工程研究所（Institute of
Computer and Communication Network Engineering）的合作。马克斯‧普朗克协会（Max
Planck Society）、德国航空太空中心和美国国家航空航天局为分幅摄像机项目提供了资金。
有关黎明号和灶神星的更多信息参见美国国家航空航天局的新闻公告。
Read more: http://iipdigital.usembassy.gov/st/chinese/inbrief/2013/10/20131001283843.html#ixzz2hxl5t0Dm
Dawn Confirms, Adds to Telescope Studies of Asteroids
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Tantalized by images from NASA’s Hubble Space Telescope and ground-based data, scientists thought the giant asteroid Vesta deserved a closer look. They got a chance to do that in 2011 and 2012, when NASA’s Dawn spacecraft orbited the giant asteroid, and they were able to check earlier conclusions. A new study involving Dawn’s observations during that time period demonstrates how this relationship works with Hubble and ground-based telescopes to clarify our understanding of a solar system object.
“Since the vast majority of asteroids can only be studied remotely by ground-based and space-based facilities, confirming the accuracy of such observations using in-situ measurements is important to our exploration of the solar system,” said Vishnu Reddy, the lead author of a paper published recently in the journal Icarus. Reddy is based at the Planetary Science Institute in Tucson, Arizona, and the Max Planck Institute for Solar System Research in Katlenburg-Lindau, Germany.
In the paper, Reddy and other members of Dawn’s framing camera team describe how up-close observations of Vesta (above) have confirmed and provided new insights into more than 200 years of Earth-based observations.
Launched in 2007, Dawn orbited Vesta for more than a year, departing in September 2012. Dawn is now on its way to the dwarf planet Ceres and will arrive there in early 2015.
Dawn’s framing cameras were developed and built under the leadership of the Max Planck Institute for Solar System Research, with significant contributions by DLR German Aerospace Center Institute of Planetary Research in Berlin, and in coordination with the Institute of Computer and Communication Network Engineering in Braunschweig. The framing camera project is funded by the Max Planck Society, DLR and NASA.
For more on Dawn and Vesta, see the NASA press release.
Read more: http://iipdigital.usembassy.gov/st/english/inbrief/2013/09/20130930283789.html#ixzz2hxlA8mf5
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