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, October 20, 2017
Full Trifid
Today's Astronomy Picture of the Day shows the Trifid Nebula, Messier 20, in the constellation of Sagittarius. "Mouseover" the image in the link to compare this astronomical object to a Full Moon.
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