Thirty Meter Telescope

Into the Celestial Horizon and Beyond

The TMT (Thirty Meter Telescope) project is a plan to build an extremely large telescope with a primary mirror 30 meters in aperture size. The project is a collaborative effort between Japan and other countries and institutions including University of California, Caltech, Association of Canadian Universities for Research in Astronomy, China, and India.

Power of TMT

In comparison to the 8 meter class telescopes, TMT will perform with approximately 4 times the spatial resolution and 200 times the sensitivity when adaptive optics is in use.

Snapshots of the center of the Milky Way Galaxy with adaptive optics (Right) and without (Left) taken with the 10m Keck Telescope. Incorporating adaptive optics will allow TMT to capture images that are even more vivid. ©Keck/UCLA Galactic Center Group

The optics of TMT consists of 492 hexagonal mirror segments 1.44 m in size that comprise the primary mirror, the 3.1 m secondary mirror, and the 2.5 x 3.5m tertiary mirror. Light is guided to the instruments located on the two Nasmyth floors.

The TMT Construction Site: Mauna Kea, Hawaii

The summit of Mauna Kea on the island of Hawaii is the home to large telescopes from around the world. TMT is scheduled for construction right next to the Subaru Telescope. Detailed TMT observation of faint and distant galaxies discovered by the Subaru Telescope and its wide-field observation capability is a powerful synergy anticipated between TMT and Subaru Telescope.

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