“Frontier Fields Galaxy Cluster MACS J0717” was uploaded to Flickr

"Frontier Fields" galaxy cluster MACS J0717, one of the most complex and distorted galaxy clusters known, is the site of a collision between four clusters. It is located about 5.4 billion light years away from Earth. via NASA ift.tt/1QPz8L0
embiggen by clicking http://flic.kr/p/EEx64J
Frontier Fields Galaxy Cluster MACS J0717 was taken on March 09, 2015 at 11:22AM