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, April 9, 2018
Filaments and Traceries
Today's Astronomy Picture of the Day is a short video from our solar weather satellite: the Solar Dynamics Observatory observes a delicate filament from our home star.