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)
Saturday, June 15, 2019
Today's Astronomy Picture of the Day is a anaglyph (red/blue three-dimensional image) of Saturn's tiny (well, relatively tiny!) moon Helene. I know I have a pair of red/blue glasses around here, somewhere...