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)
Saturday, October 25, 2014
Slice and Spots
Today's Astronomy Picture of the Day shows this week's partial solar eclipse and sunspot group AR 2192 (plus several other smaller sunspots). Goodness, it's big!