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, February 13, 2015
As above, so below: Today's Astronomy Picture of the Day has green auroral curtains being reflected in the arctic ice of of Iceland. Also present, the Moon, a lunar halo, and Jupiter.