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, December 20, 2015
Today's Astronomy Picture of the Day shows the solar panels of the International Space Station above the night skies of Earth. Can you find the red sprite?