星系团的碰撞
(原标题: A Collision of Galaxy Clusters)
2026-05-21
浏览次数: 1537
这个美丽的大螺旋在x射线下发光。它大约是我们银河系的20倍大。它属于Abell 2029，一个10亿光年外的星系团。（要想只看星系，请将鼠标悬停在图片上，或者点击这个链接。）星系团是宇宙中由重力支撑的最大结构。Abell 2029由数千个星系组成，周围环绕着巨大的热气体云，暗物质质量相当于太阳的几万亿倍。这个螺旋是由气体组成的，主要是氢和氦，加热到数千万度。这是在最近的一项研究中发现的，该研究使用了美国宇航局钱德拉x射线天文台的数据，表明Abell 2029在40亿年前与一个较小的星团发生了碰撞。碰撞影响了引力场，导致星系团内的气体晃动，就像葡萄酒在酒杯中移动一样，形成了螺旋形。
查看原文解释
This big beautiful spiral shines in X-ray light. It is about 20 times larger than our Galaxy. It belongs to Abell 2029, a galaxy cluster one billion light-years away. (To see only the galaxies, hover your cursor over the image, or follow this link.) Galaxy clusters are the largest structures in the universe that are supported by gravity. Abell 2029 is formed by thousands of galaxies, surrounded by a huge cloud of hot gas and the equivalent of hundreds of trillions times the mass of the Sun in dark matter. The spiral is made of gas, mostly hydrogen and helium, heated to tens of millions of degrees. It was found in a recent study that used data from NASA's Chandra X-ray Observatory to show that Abell 2029 had a collision with a smaller cluster four billion years ago. The collision affected the gravitational field and caused the intracluster gas to slosh, like wine moving in a wine glass, shaping the spiral.