本帖最后由 gohomeman1 于 2009-6-10 21:25 编辑
嘿嘿,今天的APOD与我昨天发的帖很有关联,就是室女座星系团的一部分——马卡林星系链。
http://apod.nasa.gov/apod/ap090609.html
2009 June 9
Markarian's Chain of Galaxies
Credit & Copyright: Piotrek Sadowski
Explanation:
Across the heart of the Virgo Cluster of Galaxies lies a striking string of galaxies known as Markarian's Chain. The chain, pictured above, is highlighted on the upper right with two large but featureless lenticular galaxies, M84 and M86. Prominent to their lower left is a pair of interacting galaxies known as The Eyes. The home Virgo Cluster is the nearest cluster of galaxies, contains over 2000 galaxies, and has a noticeable gravitational pull on the galaxies of the Local Group of Galaxies surrounding our Milky Way Galaxy. The center of the Virgo Cluster is located about 70 million light years away toward the constellation of Virgo. At least seven galaxies in the chain appear to move coherently, although others appear to be superposed by chance.
横贯室女座星系团的心脏地带,挂着一串星系构成的链——马卡林链。上图就是这个星系链,它的右上方是2个巨大但平凡的透镜一样的星系——椭圆星系M84和M86。在它们的左下方,一对相互作用星系赫然在目——没错,就像一个太空眼睛。马卡林链所在的室女座星系团是离我们最近的星系团,包含2000个以上的星系,并对我们银河系周围的本星系群有着显著的引力作用。室女座星系团的中心在室女座天区,离我们约7000万光年(这是星系团得名的主要原因——译注)。图中,至少有7个星系看上去连贯运动,其余的则是刚好在同一视线方向的视觉效应。(事实上,这几个星系的距离也差别不大——gohomeman1译注) |
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