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)
Monday, March 3, 2014
NGC 7538, in the constellation of Cepheus, is imaged by the Herschel Space Telescope. At a "mere" 9,000 light years distance, this star factory is close enough to allow astronomers a look at the process of star formation.