How do the planned mirror diameters of the TMT or GMT compare to the JWST's primary mirror?
Answer
They plan for mirrors far exceeding 20 meters in diameter, much larger than JWST's 6.5-meter mirror.
The upcoming Thirty Meter Telescope (TMT) or the Giant Magellan Telescope (GMT) plan for mirrors far exceeding 20 meters in diameter, while the James Webb Space Telescope has a 6.5-meter primary mirror.
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