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, June 29, 2019
Ruby Pinwheel
Today's Astronomy Picture of the Day is an image combining data from several instruments of Messier 83, The Southern Pinwheel, studded by dust lanes, blue star clusters and red star-forming regions.
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