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 [3820×2160] by Sean Goebel
http://bit.ly/1L9tu9K via /r/spaceporn http://bit.ly/1YjBGpM via Blogger http://bit.ly/1W1ihZh
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