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)
Sunday, January 3, 2016
A Little Activity
Today's Astronomy Picture of the Day shows the auroral rings (a new one for me!) over the dark skies of Iceland. "Mouseover" the image (in the link, not here) to get a constellation guide.