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, March 10, 2014
Today's Astronomy Picture of the Day depicts one mystery that might be the sign to prove another mystery. Are the bright regions of gamma-rays from our galactic center signs of dark matter?