spaceexplorationphotography: Galaxy clusters reveal new dark matter insights: the inner region of Abell 1689 galaxy cluster as seen from the Hubble space telescope [3853 x 3902]Source: http://www.nasa.gov/sites/default/files/thumbnails/image/pia13339.jpg
tags: ink-metal-art,
from: https://ink-metal-art.tumblr.com/post/142238019747
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