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, March 19, 2015
Active Skies
Today's Astronomy Picture of the Day is just one image posted of the solar storm that caused auroral activity in both hemispheres this week.
No comments:
Post a Comment