A Sunspot, Revealed in Incredible Detail by Europe's Newly Upgraded GREGOR Telescope

I wear glasses for astigmatism. But, as a stargazer with a visual impediment, turns out I'm in good company. The GREGOR telescope, a solar telescope located at the Teide Observatory in the Canary Islands also suffered from an astigmatism that was recently corrected...to very stellar results. Opened in 2012, GREGOR is part of a new …