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, May 25, 2018
The Crowded Skies
Today's Astronomy Picture of the Day peers into galaxy cluster Abell S0740. The most prominent (elliptical) galaxy in the field of view contains about 100 billion stars. The rest of the galaxies visible contain at least as many (probably many more than that). How many civilizations are dancing on the heads of how many pins out there?
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