Laser above Paranal Mountain

Category: Nature


Photo and caption by Christoph Malin

A sodium laser of ESO's VLT Paranal observatory stirs up a sodium beacon at mesosphere at an altitoude of about 90 km height. the sodium atoms then re-emit the laser light, producing a glowing artificial star for the VLT's adaptive optics.

Location: cerro paranal, european southern observatory, chile


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