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, February 8, 2018
Tree of Stars
Today's Astronomy Picture of the Day shows star trails (caused by long photographic exposure) over a lonely tree in Hebei Province in China.