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, April 29, 2014
Sky Glow with Aurora Dog
Today's Astronomy Picture of the Day shows the night skies over Alaska. Some nice stars ("mouseover" for a constellation guide) and the glowing aurora that happens to look like a dog.