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)
Friday, July 19, 2019
Tranquility Base
Today's Astronomy Picture of the Day is a panoramic view from Tranquility Base, landing site of Apollo 11 on July 20, 1969.
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