Copyright:CEDIC Team
原文:
Large galaxies grow by eating small ones. Even our own galaxy practices galactic cannibalism, absorbing small galaxies that get too close and are captured by the Milky Way’s gravity. In fact, the practice is common in the universe and illustrated by this striking pair of interacting galaxies from the banks of the southern constellation Eridanus, The River. Located over 50 million light years away, the large, distorted spiral NGC 1532 is seen locked in a gravitational struggle with dwarf galaxy NGC 1531 (right of center), a struggle the smaller galaxy will eventually lose. Seen edge-on, spiral NGC 1532 spans about 100,000 light-years. Nicely detailed in this sharp image, the NGC 1532/1531 pair is thought to be similar to the well-studied system of face-on spiral and small companion known as M51.
中文翻譯:
大型星系經常通過吞噬小型星系來增長，甚至我們自己的銀河系也在進行星系的食人行為，吸收那些靠得太近的小型星系，並被銀河系的重力捕獲。事實上，這種行為在宇宙中十分普遍，本次我們來看看在南方星座埃里丹斯（Eridanus, The River）之上的驚人互動星系成對。這對位於超過5000萬光年的大扭曲螺旋星系NGC 1532正在與矮星系NGC 1531（畫面中偏右）進行引力鬥爭，而小星系將最終會失敗。NGC 1532呈現邊緣觀測，跨度約100,000光年。在這幅清晰的圖像中，NGC 1532/1531對的細節十分精美，並且被認為與著名的面對面螺旋星系及小伴星系M51非常相似。
#銀河系 #星系食人行為 #NGC1532 #NGC1531 #宇宙探索 #天文學 #星際互動 #螺旋星系 #埃里丹斯 #星系成長 #壯麗宇宙
來源:NASA每日圖片
