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)
Sunday, January 6, 2019
Shooting the Stars
While today's Astronomy Picture of the Day might look like we're trying to take out alien invaders, it's a tool used to measure distortion in the atmosphere in order to "sharpen" the images returned. This is one of several methods and instruments that have developed to help keep ground-based astronomy able to more than compete with space-based astronomy (for those wavelengths that can be observed in our soupy atmosphere!)
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