For more information about TMT Hawaii, please visit https://www.maunakeaandtmt.org and https://www.maunakeaandtmt.org/get-the-facts

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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Progress made on TMT mirror production
April 29th, 2021 Engineering & Technology

TIO recently celebrated the completion of another eight newly polished roundels produced for the TMT primary mirror by Canon in Japan. The TIO and NAOJ teams responsible for the mirror polishing held a face-to-face meeting virtually on April 27, 2021 to confirm that the polishing results met the demanding requirements for these parts.

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Update from TMT Science Advisory Committee
April 23rd, 2021 Science & Astronomy

TMT’s Science Advisory Committee (SAC), which has been meeting bi-monthly since the start of the Covid-19 pandemic, recently met to address the project status, its scientific potential and suitable instrumentation. The SAC is composed of representatives from each TMT partner who advise the Project on TMT’s design, strategies and operational matter that can have a significant impact on TMT science.

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First M1 Roundels Produced by Coherent for TMT Successfully Shipped to Storage Facility in California
April 19th, 2021 Engineering & Technology

TMT and Coherent reached a new milestone this month with the completion of the first two roundels for TMT’s Primary Mirror (M1). Coherent precisely contoured and polished the optical surfaces of the roundels under the direction of TIO. They are the first of 231 roundels Coherent will provide for the TMT primary mirror array, nearly half of the total of 492 required to complete the telescope.

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TMT Mirror Segment Shipping Container Design and Prototypes Completed through Collaborative Effort with Larson Packaging Company
March 8th, 2021 Engineering & Technology

TMT, in partnership with Larson Packaging Company, recently celebrated the successful design and completion of TMT’s Primary Mirror Assembly Shipping Container (PMASC). The shipping container will enclose and protect TMT’s primary mirror segments during transport and storage between their international destinations.

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TMT Selects Coherent for Hexagonal Cutting of Mirror Segments
February 3rd, 2021 Engineering & Technology

A major milestone for the international Thirty Meter Telescope project (TMT) was reached in October 2020, as TMT selected California-based Coherent, Inc. for the Hexagonal cutting of the US allocation of its Primary Mirror (M1) segments. Coherent is one of the world’s leading providers of photonic solutions, including lasers and custom optics, and has extensive experience in large-scale precision optics and assemblies, such as those required...