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 30, 2015
Night Flight to Polar Waves
Today's Astronomy Picture of the Day shows a time-lapse image of sounding rockets being launched to explore the Aurora Borealis. Star trails, exhaust trails, lasers and auroral curtains.