The Cassini spacecraft captures a rare family photo of three of Saturn’s moons. The largest of the three, Tethys (image center), Hyperion (to the upper-left of Tethys) and Prometheus (lower-left) [1000 x 1000] via /r/spaceporn https://ift.tt/2O429vQ
via Tumblr https://ift.tt/2QUkgTp
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