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)
Monday, December 28, 2015
Today's Astronomy Picture of the Day is a short video of the first successful landing of a SpaceX Falcon 9 stage. The beginning of a new era?