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)
Thursday, October 17, 2019
System in a System
Today's Astronomy Picture of the Day shows a Cassini Orbiter image which managed to capture five of the moons of Saturn (plus a bit of the rings) in one shot.