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)
Friday, March 30, 2018
A Gathering of Galaxies
I'm not sure if a cluster of galaxies is known as a Grouping, but today's Astronomy Picture of the Day shows NGC 247 and other galaxies that can be seen in the same field of view.