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)
Thursday, November 27, 2014
Today's Pluto Picture of the Day models how dust in our home system moved and concentrated as the Solar System evolved throughout time. Clear those lanes!