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)
Sunday, April 6, 2014
Today's Astronomy Picture of the Day shows fresh "tiger stripes" (signs of a possible ocean inside the moon) on Saturn's icy moon Enceladus. What lies beneath?