环星系AM 0644-741
(原标题: Ring Galaxy AM 0644-741)
2021-07-28
浏览次数: 35
右边这个巨大的蓝色星系的边缘是一个巨大的环状结构，直径15万光年，由新形成的极其明亮的大质量恒星组成。AM 0644-741被称为环状星系，是由一次巨大的星系碰撞引起的。当星系碰撞时，它们会相互穿过，而它们各自的恒星很少接触。这个大星系的环状形状是由一个穿过它的小侵入星系引起的引力破坏的结果。当这种情况发生时，星际气体和尘埃被压缩，导致恒星形成的波从撞击点向外移动，就像池塘表面的涟漪一样。视野中的其他星系是背景星系，与am0644 -741没有相互作用。前景尖状恒星位于我们的银河系内。但较小的入侵星系被哈勃太空望远镜拍摄的画面上方和右侧捕捉到。环状星系AM 0644-741位于大约3亿光年远的南部volan星座。
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The rim of the large blue galaxy at the right is an immense ring-like structure 150,000 light years in diameter composed of newly formed, extremely bright, massive stars. AM 0644-741 is known as a ring galaxy and was caused by an immense galaxy collision. When galaxies collide, they pass through each other and their individual stars rarely come into contact. The large galaxy's ring-like shape is the result of the gravitational disruption caused by a small intruder galaxy passing through it. When this happens, interstellar gas and dust become compressed, causing a wave of star formation to move out from the impact point like a ripple across the surface of a pond. Other galaxies in the field of view are background galaxies, not interacting with AM 0644-741. Foreground spiky stars are within our own Milky Way. But the smaller intruder galaxy is caught above and right, near the top of the frame taken by the Hubble Space Telescope. Ring galaxy AM 0644-741 lies about 300 million light years away toward the southern constellation Volans.