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 17, 2018
Today's Astronomy Picture of the Day brings us Messier 31, the Andromeda Galaxy. What does the Milky Way, our home galaxy look like? Many think it looks a lot like M31.