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)
Thursday, June 27, 2019
Koyaanisqatsi
Today's Astronomy Picture of the Day is an image of a solargraph, a picture taken by a pinhole camera in a fixed position over a period of six months.
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