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)
Monday, July 22, 2019
Shadow Crossing
Today's Astronomy Picture of the Day shows the shadow of the Earth crossing the face of the Moon during last week's lunar eclipse.
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