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)
Wednesday, May 29, 2013
Sweeping the Skies
Today's Astronomy Picture of the Day shows NGC 6960, the Witch's Broom Nebula in the constellation of Cygnus. Cygnus is a wonderland of things like this!