Read about [Adaptive Optics](http://en.wikipedia.org/wiki/Adaptive_optics http://en.wikipedia.org/wiki/Adaptive_optics) -- The telescope watches the laser beam

Read about [Adaptive Optics](http://en.wikipedia.org/wiki/Adaptive_optics http://en.wikipedia.org/wiki/Adaptive_optics) -- The telescope watches the laser beam and corrects for atmospheric distortions.