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, October 23, 2014
Today's Pluto Picture of the Day shows light curves of Kuiper Belt Object 2001 QG298 taken over several time periods. What shape do the curves suggest?