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)
Saturday, December 31, 2016
Deep in the Red
Today's Astronomy Picture of the Day takes a familiar telescopic sight (Messier 20, The Trifid Nebula) and pushes our view into the infrared. There's a lot more out there than our naked eye can see!