Thirty Meter Telescope

Astronomy's Next-Generation Observatory
What is TMT?

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

What will TMT Explore?

TMT will be a unique tool for probing many outstanding open questions in astronomy.

Who is building TMT?

The Thirty Meter Telescope is being designed and developed by the TMT International Observatory LLC (TIO).

Our Story So Far...

The Board of the Thirty Meter Telescope selected Maunakea in July 2009 after a rigorous five-year campaign spanning the entire globe that measured virtually every atmospheric feature that might affect the performance of the telescope.

Latest From TMT

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TMT Camp Laniakea
September 17th, 2018 Education & Outreach

Fun and learning at TMT Camp for Puna Keikis

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The TMT Primary Mirror System Successfully Passes Final Design Review
September 10th, 2018 Engineering & Technology

PASADENA (July 26-27, 2018)– The Thirty Meter Telescope Optics Group recently achieved a critical milestone by passing its Primary Mirror Optics System (M1S) final design review. The review board, comprised of international reviewers and observers from various institutions including ESO, ITCC, JPL, JWST/Ball Aerospace, KECK, NAOJ, NIAOT, and the TMTPO*, met at TMT headquarters in Pasadena.

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Thirty Meter Telescope’s Cryogenic Cooling System Passes Conceptual Design Review
August 29th, 2018 Engineering & Technology

PASADENA July 11, 2018 – The conceptual design of TMT’s Cryogenic Cooling System (CRYO) has passed its conceptual design review. Engineers from the Technical Institute of Physics and Chemistry (TIPC) of the Chinese Academy of Sciences (CAS) joined TIO engineers at the project office to present the system that will be used to maintain parts of TMT’s first-light science instruments at cryogenic temperatures of 77 K.

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Thirty-Eight Students Complete Akamai Summer Internship Program
August 14th, 2018 Education & Outreach

The Akamai Workforce Initiative, a local program dedicated to advancing Hawai‘i college students into science and technology careers, recently wrapped up its 2018 summer internship program with a series of symposiums highlighting the interns’ work. With lead funding from the Thirty Meter Telescope, the Akamai Internship Program provides community college students and undergraduates with summer projects at observatories and other high tech...