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, February 22, 2017
Shepherd at Work
Today's Astronomy Picture of the Day is a Cassini Orbiter image of Daphnis making waves in the rings of Saturn. Spooky action! Newtonian fun!