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, October 31, 2014
Today's Astronomy Picture of the Day shows a (Halloween) Fall sky over the Devil's Tower. "Mouseover" the image for a constellation guide...and more...