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)
Sunday, March 3, 2013
As above, so below. Today's Astronomy Picture of the Day shows star trails above and river and ground trails below: Time-elapse photograph over the Grand Canyon.