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, August 1, 2013
Today's Astronomy Picture of the Day is a nice stacked image of the Moon and a long-term exposure of M31, The Great Spiral Galaxy in Andromeda. If M31 were as bright as the Moon, it would be one heck of a sight in our night sky!