The First of the Extremely Large Telescopes
Discovery Driven by Innovation
Recent News
LBT Helps Discover a Unique Growing Exoplanet
NSF Funds LIVE Project for the LBT
Fossil Galaxy Discovered at the LBT
Rubin Observatory Followup with LBT
Opportunities for LBT Access
Unprecedented View of a Supermassive Black Hole
About the LBTO

The Large Binocular Telescope conducts observations with two 8.4m- diameter mirrors on a common mount, providing a collecting area equal to a single 11.8m mirror and interferometric capability with an edge-to-edge baseline of 22.8m. With these attributes, the LBT is the first of the emerging generation of Extremely Large Telescopes.
The telescope is located on Mt Graham in southeast Arizona, which at 3200m is one of the highest observatory sites in North America. The LBT Observatory operates as an international collaboration with partners in Germany, Italy, and the United States.