Thirty Meter Telescope

Astronomy's Next-Generation Observatory


The Thirty Meter Telescope is one of a new class of extremely large telescopes that will allow us to see deeper into space and observe cosmic objects with unprecedented sensitivity and detail.


Observing light in ultraviolet to mid-infrared wavelengths, TMT will enable astronomers’ exploration of fundamental astronomy questions such as the processes of star and planet formation and unraveling galaxies in the early Universe.

KULEANA (Responsibility)

We support a community-based mutual stewardship model for Maunakea, one in which Native Hawaiians play an active role in the mountain’s management.


Under new direction in Hilo, Hawaiʻi, TMT staff are building the relationships and trust necessary for supporting Hawaiʻi’s various communities.

Latest From TMT

National Science Foundation Begins Environmental Review Process
July 19th, 2022

The National Science Foundation (NSF) today issued a Notice of Intent to prepare an Environmental Impact Statement (EIS) and to initiate Section 106 consultation for a potential NSF investment in the construction and operation of the Thirty Meter Telescope.

First TMT Primary Mirror Segment Assembly Successfully Manufactured and Built in India
May 9th, 2022 Engineering & Technology

India-TMT and industry partners Larsen and Toubro (L&T) successfully manufactured and assembled the first TMT Segment Support Assembly (SSA) in L&T Coimbatore facility. Hard work paid off and India-TMT successfully passed an Assembly Readiness Review a few weeks ago, presenting their first and recently assembled TMT SSA, including all separate compliant components, which are about 450 precision parts.

TMT Helps Students Reach for the Stars at Altadena Eliot Science Fest
May 2nd, 2022 Education & Outreach

As part of its ongoing outreach and educational activities, TMT participated in the annual Science Festival of Eliot Arts Magnet School on Saturday, April 23rd. The event provided a unique opportunity to learn about science, technology, engineering, robotics, health, and environmental activities taking place in Pasadena.