Thirty Meter Telescope
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The Thirty Meter Telescope is a planned extremely large telescope that has become controversial due to its location on Mauna Kea, on the island of Hawaiʻi. The TMT would become the largest visible-light telescope on Mauna Kea.
Scientists have been... Wikipedia
Tertiary diameter: 2.5 m × 3.5 m or 8.2 ft × 11.5 ft
Alternative names: TMT
Altitude: 4,050 m or 13,290 ft
Built: Construction began 2014, halted since 2015
Collecting area: 655 m2 or 7,050 sq ft
Coordinates: 19°49′58″N 155°28′54″W / 19.8327°N 155.4816°W
Enclosure: Spherical calotte