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)
Monday, October 8, 2018
Between the Nebula
Today's Astronomy Picture of the Day shows an interloper, Comet 21P/Giacobini-Zinner passing between the Rosette Nebula and the Cone Nebula.
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