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)
Saturday, April 2, 2016
Today's Astronomy Picture of the Day brings us a three-dimensional look at the stark plutonian landscape. Get out your red/blue glasses for this one!