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, September 13, 2018
The Crowded Sky
Today's Astronomy Picture of the Day shows a crowded sky. Off in the galactic distance, the nebula and rich starfields of the constellation of Auriga. Close in, relatively speaking, a visitor to the inner system, Comet 21P/Giacobini-Zinner.
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