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)
Saturday, November 23, 2013
Today's Astronomy Picture of the Day is a short video taken by the STEREO-A spacecraft. Comet Encke (which has survived the trip many times) and Comet ISON (C/2012 S1) are falling ever closer to the Sun. Will ISON survive?