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, April 30, 2019
Today's Astronomy Picture of the Day appears to depict a near miss between an infalling meteor and Messier 33. Even more interesting is what is happening to the trail of that meteor along it's trail!