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 Portal ...
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