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)
Sunday, June 5, 2016
Travels with PanSTARRS
Today's Astronomy Picture of the Day shows Comet C/2013 X1 (PanSTARRS) as it passes the Helix Nebula. PanSTARRS was not a spectacular naked-eye comet, but has provided some fantastic imaging opportunities for equipped amateurs (and professionals).