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)
Wednesday, July 22, 2015
A Hard Rain Falls
Today's Astronomy Picture of the Day is a short video showing gamma-ray "rain" falling as a result of an outburst from active galaxy 3C 279.