As ESO was testing the Wendelstein laser guide star unit Algu south Germany by shooting a powerful laser beam into the atmosphere one of the regions intense summer thunderstorms was approaching Credit ESOM Kornmesser

Tags: space, testing, wendelstein, laser, guide, star, unit, algu, south, germany, shooting, powerful, beam, atmosphere, regions, intense, summer, thunderstorms, approaching, credit, esom, kornmesser

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