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)
Friday, August 21, 2015
Dancing at the Edge
Today's Astronomy Picture of the Day is a view from the International Space Station, a snapshot of the stars, cities, the atmosphere and rarely-seen red sprites dancing above a thunderstorm.