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, May 6, 2013
Today's Astronomy Picture of the Day shows Comet Lemmon (C/2012 F6 Lemmon) as it heads out to the edges of our system. Great detailing and coloration here!