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 19, 2014
Bearing on a Spiral
Today's Astronomy Picture of the Day brings us Messier 81 in Ursa Major. Just down the block from us (11.8 million light years down the block).