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)
Saturday, July 29, 2017
Sky Show
Today's Astronomy Picture of the Day shows auroral activity from the viewpoint of the International Space Station.
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