Copyright:Chuck Ayoub
中文翻譯:
在浩瀚的宇宙中，有兩個小星星，那就是NGC 147和NGC 185。它們就像是星空中一對好朋友，總是肩並肩地出現在我們的望遠鏡中。這兩顆小星星是M31，也就是高大上的仙女座星系的小夥伴，距離我們的地球大約2.5百萬光年。在天空中，這兩顆星星的距離不到一度，實際上相隔約35,000光年哦！不過，仙女座星系在這幅畫面之外，我們可以看到更亮、更著名的星星，像是M32和M110，都在仙女座星系附近。NGC 147和NGC 185被認為是一對二元星體，它們像是一對好朋友，緊緊相依，共同圍繞著仙女座星系轉圈。最近發現的微弱矮星系Cassiopeia II似乎也想加入它們的行列，形成了仙女座星系中一個好玩的星團，湊在一起的星星們真是有趣！
原文:
Dwarf galaxies NGC 147 (left) and NGC 185 stand side by side in this deep telescopic portrait. The two are not-often-imaged satellite galaxies of M31, the great spiral Andromeda Galaxy, some 2.5 million light-years away. Their separation on the sky, less than one degree across a pretty field of view toward the constellation Cassiopeia, translates to only about 35 thousand light-years at Andromeda’s distance, but Andromeda itself is found well outside this frame. Brighter and more famous satellite galaxies of Andromeda, M32 and M110, are seen much closer to the great spiral. NGC 147 and NGC 185 have been identified as binary galaxies, forming a gravitationally stable binary system. But recently discovered faint dwarf galaxy Cassiopeia II also seems to be part of their system, forming a gravitationally bound group within Andromeda’s intriguing population of small satellite galaxies.
來源:NASA每日圖片
