Copyright:Rafael Sampaio
中文翻譯:
在我們的銀河系中，有兩顆明亮的星星像守護者一樣站在前景中，閃閃發光。它們背後是遙遠的海蛇星團（Hydra Cluster）中的其他星系。雖然這兩顆星星距離我們數百光年，但海蛇星團的星系卻有超過一億光年的距離！在這個星團的中心，有三顆巨大的星系，其中兩顆是黃色的橢圓星系（NGC 3311 和 NGC 3309），還有一顆顯眼的藍色螺旋星系（NGC 3312），它們的直徑約為 150,000 光年。還有一對有趣的交疊星系（NGC 3314），位於 NGC 3312 的上方和左側。海蛇星團也叫做Abell 1060，是距離銀河系 兩億光年內的三個大型星系團之一。在我們附近的宇宙中，星系是由引力組成的星團，這些星團又鬆散地組成超星系團。而這些超星系團，又在更大的範圍上排列著。
原文:
Within our own Milky Way galaxy, two bright, spiky stars stand like sentinels in the foreground of this cosmic snapshot. Far beyond them are the galaxies of the Hydra Cluster. In fact, while the spiky foreground stars are hundreds of light-years distant, the Hydra Cluster galaxies are well over 100 million light-years away. Three large galaxies near the cluster center, two yellow ellipticals (NGC 3311, NGC 3309) and one prominent blue spiral (NGC 3312), are the dominant galaxies, each about 150,000 light-years in diameter. An intriguing overlapping galaxy pair cataloged as NGC 3314 lies above and left of NGC 3312. Also known as Abell 1060, the Hydra galaxy cluster is one of three large galaxy clusters within 200 million light-years of the Milky Way. In the nearby universe, galaxies are gravitationally bound into clusters which themselves are loosely bound into superclusters. Superclusters in turn are seen to align over even larger scales.
來源:NASA每日圖片
