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, April 1, 2013
Today's Astronomy Picture of the Day celebrates the date (April 1) with a test. Which is the moon? Which is the frying pan. Follow the links for even more tests!