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)
Friday, April 26, 2013
Today's Astronomy Picture of the Day is a combination of a number of images, collected over a year, by the orbiting Solar Dynamics Observatory of our quiet star. Doesn't look all that sedate now, does it?