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)
Wednesday, September 23, 2015
Cycles
Today's Astronomy Picture of the Day compresses a half-hidden solar cycle over the frozen skies of the southern polar region.
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