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)
Saturday, February 25, 2017
Survey
Today's Astronomy Picture of the Day stretches from horizon to horizon and includes all the major planets. "Mouseover" the image for a guide and click on the image to get to the other half of the way.
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