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, June 6, 2013
Sidewise in Size
Today's Astronomy Picture of the Day is a short video showing us how big is big. How big are the planets in the Solar System? How big is the Sun vs. other stars?