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, January 30, 2017
Hey, remember marbles? Remember trading them? Remember which ones were considered valuable? Nah, me neither. Today's Astronomy Picture of the Day is NGC 6543, The Cat's Eye Nebula.