Giant Magellan Telescope (GMT)

The Giant Magellan Telescope (GMT) is a ground-based extremely large telescope under construction, planned for completion in 2025.[6] It will consist of seven 8.4 m (27.6 ft) diameter primary segments,[7] with the resolving power of a 24.5 m (80.4 ft) primary mirror and collecting area equivalent to a 22.0 m (72.2 ft) one,[8] which is about 368 square meters.[5] The telescope is expected to have the resolving power 10 times greater than the Hubble Space Telescope, and will be the largest optical observatory in the world, at the time of its first light. As of December 2015, four mirrors have been cast and the construction of the summit facility has begun.[4][9]
A total of seven primary mirrors are planned, but it will begin operation with four.[10][11] The $1 billion project is US-led in partnership with Australia, Brazil, and Korea, with Chile as the host country.

https://en.wikipedia.org/wiki/Giant_Magellan_Telescope

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