Time lapse virtuoso Sean Goebel produced a stunning video of the Mauna Kea, Hawaii observatories in action. Two and a half minutes of pure enjoyment. Filming the feature took Sean seven nights over several months. I have to assume he also spent months post-processing the thousands of images he shot.
The lasers featured in the video are used to measure atmospheric turbulence. Adaptive optics on the telescopes use the measurements to compensate for the turbulence to produce clear images.