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)
Thursday, September 4, 2014
Today's Astronomy Picture of the Day shows Comet Siding Spring (C/2013 A1) passing through the rich star fields of the Small Magellanic Cloud, 47 Tucanae and NGC 362. Siding Spring is on it's way to a close encounter with Mars.