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, November 20, 2013
On the Edge
Today's Astronomy Picture of the Day is an artist conception of the strange space around a black hole. 4U1630-47 displays jets of energy coming from it's poles. What causes this?