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)
Friday, May 10, 2019
Streaks Across the Galaxy
Today's Astronomy Picture of the Day shows the arch of the Milk Way crossed by the transient streaks of the Eta Aquarids (which are debris left by Comet Halley).