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)
Monday, November 2, 2015
Today's Astronomy Picture of the Day is a short film showing the breakup of Comet C/2012 S1 (ISON). Filmed by the hard-working SOHO observatory, in operation since 1995 (!).