The Comacluster of galaxies pictured above is one of the densest clusters known - it contains thousands of galaxies.
这张照片中的后发星系团是已知最密集的星系团之一——包含了数千个星系。
2
Possibly because the galaxy, NGC 4911, is being pulled at by its neighbors as it falls into the enormous ComaCluster of Galaxies.
可能是因为这个星系(NGC 4911)正被拉扯进巨大的后发座星系团之中。
3
Remarkably, the ion tail easily stretches past background star cluster NGC 1245 (upper left) in the constellation Perseus, about 1.5 degrees from the comet's lovely greenish head or coma.