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)
Thursday, October 3, 2013
Close Up on New Worlds
In today's Astronomy Picture of the Day, Messier 106 close up. Given the frequency of planet discoveries within our galaxy, how many other worlds are we looking at?