Video encyclopedia

Large Binocular Telescope


Large Binocular Telescope


LBT Large Binocular Telescope Observatory


Large Binocular Telescope Adaptive Optics Demonstration


Large Binocular Telescope


nikon 20x120 big binoculars

The Large Binocular Telescope (LBT) is an optical telescope for astronomy located on 10,700-foot (3,300 m) Mount Graham, in the Pinaleno Mountains of southeastern Arizona, United States. It is a part of the Mount Graham International Observatory. The LBT is currently one of the world's most advanced optical telescopes; using two 8.4 m (27 ft) wide mirrors, with centres 14.4 m apart, it has the same light-gathering ability as an 11.8 m (39 ft) wide single circular telescope and detail of a 22.8 m (75 ft) wide one. Its mirrors individually are the joint second-largest optical telescope in continental North America, behind the Hobby–Eberly Telescope in West Texas; it is also the largest monolithic, or non-segmented mirror, in an optical telescope. Strehl ratios of 60–90% in the infrared H band and 95% in the infrared M band have been achieved by the LBT.
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    • Project 

    • First light 

    • Adaptive optics 

    • In the media 

    • Discoveries and observations 

    • Instruments 

    • LBTO collaboration 

    • Other MGIO facilities