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)
Tuesday, June 11, 2019
Illuminated Cave
Today's Astronomy Picture of the Day brings us a Spitzer Space Telescope image of the Cave Nebula region in Cepheus. "Mouseover" the image in the link for a guide, which includes a runaway star.
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