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)
Wednesday, March 19, 2014
Today's Astronomy Picture of the Day is a short video that shows an entire year on Earth as seen from space. Watch the day-night line shift!