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)
Tuesday, February 2, 2016
Today's Astronomy Picture of the Day shows Comet 67/P (Churyumov–Gerasimenko) as viewed by the ESA's Rosetta probe. The comet is heading away from the Sun, taking Rosetta with it.