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, March 24, 2017
Nice Grouping
Today's Astronomy Picture of the Day features an owl and galaxy and a local interloper. Comet 41P/Tuttle–Giacobini–Kresak encounters galaxy Messier 108 and nebula Messier 97 (the "Owl Nebula").
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