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)
Monday, October 13, 2014
Today's Pluto Picture of the Day shows the light curve which was generated when Pluto occultated a star. The shape of the curve suggests that the atmosphere is primarily that of nitrogen.