Blog: My Life In The Simplest Form
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original: https://empressrarapo.tumblr.com/post/160605092582
just–space: Frontier Fields Galaxy Cluster MACS J0717 : 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