Reposted by Bill Keel
Nice historical note: this is the 30th anniversary of the first time astronomers reached the diffraction limit with a sodium laser guide star.
www.ucobservatories.org/pioneering-t...
ucobservatories.org
Pioneering the Stars: Celebrating 30 Years of Sodium Laser Guide Star Adaptive Optics at Lick Observatory
Thirty years ago, in September and October 1996, an extraordinary breakthrough took place atop Mount Hamilton that forever changed ground-based astronomy. On the 3-meter Shane Telescope at Lick Observ...