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, March 15, 2018
Cataloging the Galactic Zoo
Today's Astronomy Picture of the Day focuses on humanity's need to make lists. Astronomers have long worked at cataloging the sky and here we see the initial efforts of Charles Messier (who was actually listing things that were not comets) to the New General Catalog and Index Catalog (J.L.E. Dreyer) and beyond.
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