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, March 15, 2014
Red and Blue for Seventeen
Today's Astronomy Picture of the Day is an anaglyph of the Apollo 17 landing site, showing the lunar rover in the foreground and the delicate bubble of human-compatible environment in the background.