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)
Sunday, May 22, 2016
Today's Astronomy Picture of the Day shows the star-driven winds of The Great Orion Nebula. Look to the short story Bow Shock by Gregory Benford for an interesting play on what might be happening.