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, September 14, 2018
HALO
Today's Astronomy Picture of the Day breaks down the details of a Sun Halo. "Mouseover" the image in the link to see what is what.
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