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, December 19, 2015
Today's Astronomy Picture of the Day shows NGC 4631 in the constellation of Canes Venatici. Cosmic whales (do we have cosmic whaling ships?)!