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)
Thursday, January 21, 2016
Two-Tail
Today's Astronomy Picture of the Day is a finely-detailed image of Comet Catalina (C/2013 US10) and it's dust and ion tails as it seemed to pass near Messier 101 in the constellation of Ursa Major.
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