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)
Wednesday, July 23, 2014
Today's Astronomy Picture of the Day shows reflection nebula IC 4603 in the constellation of Ophiuchius. Has anybody answered the hotline recently?