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, December 20, 2018
The Red Green Blue Show
Today's Astronomy Picture of the Day shows Comet 46P/Wirtanen as it cruises through the rich star and nebula fields of Taurus, the Pleiades and the California Nebula. Chesley Bonestell would be thrilled!