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, April 3, 2019
A Horse of a Different Color
Today's Astronomy Picture of the Day shows a familiar (if elusive) part of the Orion constellation: the so-called Horsehead Nebula in a new light.