今日APOD：星系浩劫

APOD

我们从地球上看到的这个强烈扭曲的星系对，编号为Arp81。它们已经碰撞了一亿年了。碰撞时，两个星系的重力相互作用引发了一场浩劫。从这张彩色合成图像中，可以看到扭曲的气体和尘埃，大量恒星形成的混乱、绵延20万光年的潮汐尾扫荡着星系残骸。图中NGC6622（左）和NGC6621两个星系大小大致相等，在遥远的未来注定要经历同样的过程，合并成一个巨大的星系。这个星系对位于天龙座，离我们2.8亿光年。这幅锐利的合成图像来自于哈勃归档数据（Hubble Legacy Archive data），在更遥远的背景上，还可以分辨出一些星系。
Explanation: From planet Earth, we see this strongly distorted pair of galaxies, cataloged as Arp 81, as they were only about 100 million years after their close encounter. The havoc wreaked by their mutual gravitational interaction during the encounter is detailed in this color composite image showing twisted streams of gas and dust, a chaos of massive star formation, and a tidal tail stretching for 200 thousand light-years or so as it sweeps behind the cosmic wreckage. Also known as NGC 6622 (left) and NGC 6621, the galaxies are roughly equal in size but are destined to merge into one large galaxy in the distant future, making repeated approaches until they finally coalesce. Located in the constellation Draco, the galaxies are 280 million light-years away. Even more distant background galaxies can be spotted in this sharp, reprocessed, image from Hubble Legacy Archive data.

既是毁灭也是新生！！！！！！

星系融合的过程也是惊心动魄的。

上亿的宇宙文明大逃亡。。。。肯定很壮观

很壮观！

壮观~~

几十亿年后，银河系与M31将会述说同样的故事。

牧夫姚远 发表于 2014-4-23 18:18
上亿的宇宙文明大逃亡。。。。肯定很壮观

1.5级以下的文明是跑不掉的，2.5级以上的文明能跑得掉，但也无需跑，星系合并对于2.5级以上文明是求之不得的机遇

要是能被掌控多好呀

星系碰撞其实很常见，未来随着宇宙的膨胀星系碰撞的机会会越来越少。

三叶观天 发表于 2014-4-23 22:03
1.5级以下的文明是跑不掉的，2.5级以上的文明能跑得掉，但也无需跑，星系合并对于2.5级以上文明是求之不 ...

请问文明是怎么分级的，没找到想信息，谢谢！

mingkoukou 发表于 2014-4-24 14:20
请问文明是怎么分级的，没找到想信息，谢谢！

欢迎阅读我转载的这贴：《人类社会能够达到哪个文明阶段？》http://www.astronomy.com.cn/bbs/ ... &fromuid=137889
(出处: 牧夫天文论坛（中国最早的天文论坛，致力于天文和望远镜的科普交流平台）)

一定非常震憾，超级混乱融和。