sagalliant 发表于 2009-3-1 14:06

APOD:半人马座Omega星团，已知最大的球状星团

来源：APOD

This huge ball of stars predates our Sun. Long before humankind evolved, before dinosaurs roamed, and even before our Earth existed, ancient globs of stars condensed and orbited a young Milky Way Galaxy. Of the 200 or so globular clusters that survive today, Omega Centauri is the largest, containing over ten million stars. Omega Centauri is also the brightest globular cluster, at apparent visual magnitude 3.9 it is visible to southern observers with the unaided eye. Cataloged as NGC 5239, Omega Centauri is about 18,000 light-years away and 150 light-years in diameter. Unlike many other globular clusters, the stars in Omega Centauri show several different ages and trace chemical abundances, indicating that the globular star cluster has a complex history over its 12 billion year age.

szxdyx 发表于 2009-3-1 14:41

呵呵，好壮观哦，呵呵！

evangelion0t 发表于 2009-3-1 15:05

好漂亮::070821_04.jpg::

kingbird79 发表于 2009-3-2 22:35

xdl3040 发表于 2009-3-3 11:04

我看不怎么漂亮吧::070821_18.jpg::

skyczheng 发表于 2009-3-4 12:57

星星太多了，数都数不尽了！

w89244272 发表于 2009-3-5 12:51

打开的真慢 ::070821_05.jpg::

霓虹彩云 发表于 2009-3-16 14:01

真漂亮，星星可真多啊！

gohomeman1 发表于 2009-3-16 23:05

这个距离到底是多少呢，有说1.5万光年的，有1.6万光年的，这里又说是1.8万光年。

micyang 发表于 2009-3-17 21:32

bsum 发表于 2009-3-19 20:45

能摘到就好了，哈哈，不过真的好美呀！

卜仕仁 发表于 2009-3-20 12:46

hovering 发表于 2012-5-23 14:46

编号写错了，是NGC5139
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