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Sunday, March 6, 2016

15-40w lasers using adaptive optics to counter atmospheric turbulence at the Keck Observatory - which also houses the two most scientifically productive telescopes on earth - are often used by stargazing tourists [3820x2160] by Sean Goebel


http://bit.ly/1L9tu9K via /r/spaceporn http://bit.ly/1YjBGpM
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