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, February 16, 2015
Today's Astronomy Picture of the Day shows us the active galaxy that is Messier 106 in the constellation of Canes Venatici. What eldritch horrors lurk at the center?