Due to Safford's relatively isolated dark sky location, the area has been chosen as a prime spot for hosting observatories. Safford and Thatcher's street lights are low-output to improve the quality of the images taken by the observatories atop the mountain to the southwest of the city. The mountain for which the county is named, Mount Graham, is just a few miles southwest of the city. The mountain is home to the Mount Graham International Observatory (MGIO) and Large Binocular Telescope, or LBT. It, when completed, will be the largest binocular telescope in the world. The mountain also is home to the Vatican Advanced Technology Telescope, or VATT. It is also home to the Heinrich Hertz Submillimeter Telescope, or SMT. The Mount Graham International Observatory complex is operated by the University of Arizona.