Thirty Meter Telescope

Astronomy's Next-Generation Observatory

Explore the latest news, events and announcements from the TMT International Observatory

March 23rd, 2023 • News
TMT’s Telescope Structure Readies for Production
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March 23rd, 2023 • Photograph
TMT STR PRRs 2 & 3 meetings in Japan
February 21st, 2023 • News
Pasadena Students in Caltech's Planet Finder Academy Hold Workshop at TMT Lab
February 17th, 2023 • News
Beautiful Photos of Green Comet C/2022 E3
February 27th, 2023 • Education & Outreach
Journey Through the Universe Returns to Hilo Classes
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February 9th, 2023 • Photograph
Deputy Chief of Mission at the US Embassy of India visits TMT
February 1st, 2023 • News
India TMT Coordination Centre Produces TMT Main Mirror Roundel
January 27th, 2023 • News
Call for TMT International Science Development Teams (ISDTs) Applications
February 3rd, 2023 • Press Coverage
New Project Director for NOIRLab US-ELT Program Appointed
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January 23rd, 2023 • Photograph
TMT M1 Roundel (SN050) produced by ITCC
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January 13th, 2023 • Photograph
TMT and the US Extremely Large Telescope Program Teams at AAS 241
January 13th, 2023 • Press Coverage
In Hawaii, new state panel stirs hope for giant telescope
December 22nd, 2022 • News
TMT 2022 Holiday Card
December 22nd, 2022 • Press Coverage
Students propose Hawaiian names for exoplanet, star
December 22nd, 2022 • Press Coverage
Eye on the Universe: India To Help Build World’s Largest Thirty-Metre Telescope
January 8th, 2023 • Conference
TMT will be at #AAS241 in Seattle
December 1st, 2022 • Press Coverage
Giant telescopes take small but significant steps toward realization
November 21st, 2022 • Press Coverage
Thirty Meter Telescope International Observatory: Coherent Supplies Optics for Ambitiou...
November 17th, 2022 • News
TMT Segment Mount Undergoes Tests in the Netherlands
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November 17th, 2022 • Collage
TMT SSA Module Acceptance Test Tool (SMATT)
November 16th, 2022 • News
TMT Promotes Science at UCLA’s “Exploring Your Universe 2022”
November 10th, 2022 • News
2022 AstroDay West Hawaiʻi
October 28th, 2022 • Press Coverage
Edward Stone Retires After 50 Years as NASA Voyager’s Project Scientist
November 16th, 2022 • Educational
Exploring Your Universe
October 19th, 2022 • News
MODHIS Completes First Phase of Conceptual Design Review
October 12th, 2022 • News
Updates for TMT Telescope Structure and Utility Services
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September 12th, 2022 • Photograph
Imiloa Center welcomes students from Nago Japan
August 26th, 2022 • Press Coverage
A New Stewardship Paradigm for Maunakea
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July 28th, 2022 • Photograph
TMT at SPIE Astronomical Telescopes & Instrumentation 2022
July 19th, 2022 • News
National Science Foundation Begins Environmental Review Process

What is TMT?

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.

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 ...

In 2009, the Thirty Meter Telescope International Observatory (TIO) selected Maunakea, on Hawaiʻi Island, as the preferred site to build and operate TMT after a rigorous five-year campaign that spanned the globe.

Latest From TMT

TMT’s Telescope Structure Readies for Production
March 23rd, 2023 Engineering & Technology

TMT’s telescope structure subsystem (STR) recently completed two successful Production Readiness Reviews (PRR2 and PRR3) to assess the availability of adequate resources and planning for production, and later for assembly, integration and verification. The STR’s design and future fabrication are activities led by NAOJ and their prime contractor Mitsubishi Electric Corporation (MELCO) in Japan.

Pasadena Students in Caltech's Planet Finder Academy Hold Workshop at TMT Lab
February 21st, 2023 Education & Outreach

Nineteen Caltech Planet Finder Academy high school students from across the Pasadena Unified School District (PUSD) recently visited the TMT Lab in Monrovia. TMT System Scientist Warren Skidmore welcomed the group and ran a special workshop for the students.