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, January 12, 2018
Interloper
Today's Astronomy Picture of the Day shows Comet PanSTARRS C/2016 R2 displaying shades of blue courtesy of excited carbon monoxide molecules.
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