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, January 1, 2016
Not One, But Two
Today's Astronomy Picture of the Day shows the tail and anti-tail of Comet C/2013 US10 (Catalina) as it arcs away from the warmth of the Sun.