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, April 13, 2019
The Dark Among the Stars
Today's Astronomy Picture of the Day shows one of our close neighbors, Rigel Kentaurus and the dark nebula complex Sandqvist 169.
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