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, December 21, 2015
Today's Astronomy Picture of the Day is a pretty amazing story. A supernova is spotted. Then a chance alignment is spotted and thanks to gravitational lensing, we can see the supernova take place.