A Dark Hydrogen Cloud in the Virgo Cluster
本帖最后由 positron 于 2010-7-25 21:33 编辑05年发表的一篇学术论文，似乎说是在室女星系团发现了一个几乎全由暗物质组成的星系，感兴趣的可以看看，或者翻译下更好。
http://arxiv.org/abs/astro-ph/0502312
维基百科上的一段简介：
In 2005, astronomers from Cardiff University claimed to discover a galaxy made almost entirely of dark matter, 50 million light years away in the Virgo Cluster, which was named VIRGOHI21. Unusually, VIRGOHI21 does not appear to contain any visible stars: it was seen with radio frequency observations of hydrogen. Based on rotation profiles, the scientists estimate that this object contains approximately 1000 times more dark matter than hydrogen and has a total mass of about 1/10th that of the Milky Way Galaxy we live in. For comparison, the Milky Way is believed to have roughly 10 times as much dark matter as ordinary matter. Models of the Big Bang and structure formation have suggested that such dark galaxies should be very common in the universe[citation needed], but none had previously been detected. If the existence of this dark galaxy is confirmed, it provides strong evidence for the theory of galaxy formation and poses problems for alternative explanations of dark matter.
印象中以前有人发过相关帖子，辛苦地找了一把
http://www.astronomy.com.cn/bbs/viewthread.php?tid=70687&highlight=%E6%9A%97%E7%89%A9%E8%B4%A8 回复 2# liverpool
一个很强大的帖子啊~~~ 回复 3# positron
因为当时自己也小翻译了一点东西，还和一个不太友善的同好打了点口水仗，所以有点印象呵呵 回复 4# liverpool
呵呵，那里SamuelHan基本上是在捣乱，再加上紫月乱七八糟的理解，也算是给大家放松啊。
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