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, June 24, 2018
Today's Astronomy Picture of the Day shows the shadow of the plume left by Space Shuttle Atlantis (in 2001) seemingly pointing towards the Moon. We're still waiting to go back!