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, April 25, 2015
After the Heat
Today's Astronomy Picture of the Day is another Hubble Space Telescope anniversary image. Off in the constellation of Carina, we find a rich star-forming region of Westerlund 2.