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)
Saturday, June 2, 2018
Ebbs and Flows
Today's Astronomy Picture of the Day shows geological activity (volcano, anyone?) from the Kilauea caldera on the "Big Island" of Hawaii under the sedate stars of the Milky Way.