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)
Tuesday, September 30, 2014
Rilles or Rivers
Today's Pluto Picture of the Day shows Triton as imaged by the Voyager 2 mission. In the right part of the image: rivers?