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)
Monday, May 22, 2017
Dust Over the River
Today's Astronomy Picture of the Day shows zodiacal light and subtle nebula over the Horseshoe Bend of the Colorado River. "Mouseover" the image in the link for a constellation guide.