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)
Tuesday, February 4, 2014
Today's Astronomy Picture of the Day shows a particle beam forming a jet inside of Herbig-Haro Object 24. The amount of detail we can see across interstellar distances just boggles my mind.