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, August 24, 2018
Double Messier
Today's Astronomy Picture of the Day shows Messier 20 and Messier 21 in the constellation of Sagittarius. Let's peer towards the center of our home galaxy, shall we?
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