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 22, 2017
Charting the Eclipse
Today's Astronomy Picture of the Day shows the path of the Sun (using a pinhole solargraph) on the day of the Great American Eclipse.
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