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)
Thursday, March 29, 2018
Today's Astronomy Picture of the Day shows NGC 2023, dusy molecular clouds in the constellation of Orion. It's often overlooked due to the proximity of one of amateur astronomy's elusive targets, the Horsehead (off camera in this case).