Credit: TMT International Observatory
The Thirty Meter Telescope (TMT) Telescope Structure serves as the framework onto which all other subsystems (mirrors, science instruments, cables, refrigerant lines, laser guide star facility, etc.) get attached. The telescope structure is divided into two main rotating systems: the azimuth and the elevation structures. The azimuth structure supports the elevation structure and the multiple scientific instruments located on the two Nasmyth platforms. The telescope, about 50 meters tall and 55 meters wide, will be enclosed within a very compact dome. It will weigh close to 3000 metric tons and will be capable of completing a full azimuth rotation in less than 3 minutes.