missississi

July 24, 2007

南天纸风车:旋涡星系M83

Filed under: 客舟

来自APOD

M83是空中最近最亮的星系之一,在长蛇座,双筒望远镜可见,宏伟的旋臂使它得到了南天纸风车的绰号。尽管250年前就被发现了,但也是近期才知道M83不是星云而是象我们银河系一样的星系。M83是1500万光年远星系群的一个成员,该星系群还包括半人马A、NGC5253等。M83中发现了好几个明亮的超新星,其中心发现了两个绕中心的环。

 

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