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, September 7, 2019
The Lair of the Wolf
Today's Astronomy Picture of the Day shows the rich star fields, emission and reflection nebula, and young blue stars of Wolf's Lair, a nebular complex in the constellation of Cepheus.