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, May 10, 2013
Today's Astronomy Picture of the Day shows Messier 77, in the constellation of Cetus. We have here a beautiful study of dust clouds, star-forming regions and the bright core (containing a massive black hole).