These great hollow globes of artificial super-metals, and artificial transparent adamant, ranged in size from the earliest and smallest structures, which were no bigger than a very small asteroid, to spheres considerably larger than the Earth. (Olaf Stapledon, STAR MAKER)
Tuesday, September 26, 2017
Full Image
Today's Astronomy Picture of the Day brings us a parting gift. As it fell towards the end of its mission, the Cassini Orbiter snapped one final whole-ring image of Saturn.
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