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)
Friday, February 20, 2015
Today's Astronomy Picture of the Day shows a past conjunction between our Moon and Venus. Tonight will see a similar conjunction, but will also include a faint Mars.