Thirty Meter Telescope

Astronomy's Next-Generation Observatory

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

December 11th, 2023 • Conference
The Scientific Landscape for Extremely Large Telescopes in Light of JWST. Part I. Americas
September 1st, 2023 • News
Faster Processing for TMT's Precision Mirrors
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August 22nd, 2023 • Photograph
U.S. Representative Judy Chu visited TMT
August 19th, 2023 • Education & Outreach
Tanabata Japanese Star Festival
July 17th, 2023 • News
Dust Boot Design for TMT’s Primary Mirror Moves Into Final Design Stage
July 4th, 2023 • News
Progress in India-TMT Optics Fabrication Facility Commissioning
June 9th, 2023 • News
International One Sky Project Highlights Importance and History of Indigenous Astronomy...
June 6th, 2023 • News
TMT Refrigeration Cooling System Proceeds to Preliminary Design Phase
June 2nd, 2023 • News
TMT Mirrors Alignment and Phasing System Progress
May 16th, 2023 • News
A Great AstroDay in Hilo
June 4th, 2023 • Conference
TMT will be at #AAS242 in Albuquerque
May 12th, 2023 • News
UH Mānoa Institute for Astronomy Open House 2023
April 28th, 2023 • News
Pasadena Science Fest 2023
February 15th, 2023 • Press Coverage
A View of the Universe: TNO Contributes to TMT Success
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April 27th, 2023 • Artwork
Artist rendering of TMT
April 26th, 2023 • News
TMT’s Segment Support Assembly Enters Production in India
April 25th, 2023 • News
TMT Supports “Girls in Future Technologies”
March 29th, 2023 • Press Coverage
Path forward for Thirty Meter Telescope and Mauna Kea begins to emerge
March 23rd, 2023 • News
TMT’s Telescope Structure Readies for Production
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April 27th, 2023 • Artwork
The Thirty Meter Telescope
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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
November 17th, 2022 • News
TMT Segment Mount Undergoes Tests in the Netherlands

Our Mission and Values

TMT is committed to a community model of astronomy based on the values of respect, inclusion, and mutual stewardship.

Our Science and Technology

TMT is an extraordinary international scientific endeavor that will revolutionize our understanding of the universe and our place within it.


Maunakea is a truly unique place.

Our Community

TMT staff are part of the Hawaiʻi community and TMT firmly believes it is our kuleana (responsibility) to be active supporters of that community.

Latest From TMT

Faster Processing for TMT's Precision Mirrors
September 1st, 2023 Engineering & Technology

Coherent installs an advanced ultrasonic machine tool to speed hexing of the 1.5 m diameter Thirty Meter Telescope mirror segments.

TMT Monrovia Lab Visit
August 22nd, 2023 Education & Outreach

On 18 July 2023, Sergio Salata, Astronomy Project Manager of Added Value Solutions (AVS) in Tenerife, visited the TMT office to tell us about the astronomy projects and other science equipment development projects the AVS company had been involved with. His short talk and discussions with project staff covered astronomy instrumentation, cooling, cryostats, opto-mechanics and other topics of relevance to TMT development.