An infrared image of Messier 101, or the Pinwheel Galaxy, which is 170,000 light-years across and twice the diameter of the Milky Way, captured by the Spitzer Space Telescope in 2008.Credit…NASA/JPL via /r/spaceporn https://ift.tt/2PBao1H
via Tumblr https://ift.tt/2TaDfvX
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