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The Observatory


TMT Mirror Segment Shipping Container Design and Prototypes Completed through Collaborative Effort with Larson Packaging Company

March 8th, 2021

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...


TMT Selects Coherent for Hexagonal Cutting of Mirror Segments

February 3rd, 2021

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...


Approval of the first Production Roundel for Thirty Meter Telescope’s Primary Mirror

February 1st, 2021

The Thirty Meter Telescope Optics Group recently reached a critical production milestone, with the approval of the first polished roundel (# SN023) for TMT’s Primary Mirror (M1). Teams at TIO,...


Inauguration of the ITOFF facility, CREST Campus, IIA, India

January 20th, 2021

The newly built India-TMT Optics Fabrication Facility (ITOFF) was recently inaugurated by Vice President of India Shri. Venkaiah Naidu at the Center for Research and Education in Science &...


TMT Optical Test Instruments System Passes Preliminary Design Review

October 26th, 2020

TMT Optics and Systems Engineering teams have reached another major milestone, with a successful “gate” review of the TMT optical Test INstruments System (TINS) preliminary design.


Conceptual Design of TMT’s Wide-Field Optical Spectrometer Instrument Progresses

July 23rd, 2020

One of TMT’s three “Early Light” instruments, the Wide-Field Optical Spectrometer (WFOS), recently underwent an interim Conceptual Design Review via Zoom. The review’s purpose was to assess the...


TMT Engineering Sensors System Advances to Final Design Phase

June 26th, 2020

Recently, the TMT Engineering Sensors System (ESEN) successfully passed its Preliminary Design Review (PDR) and is now ready to enter the Final Design phase. Chris Carter and Scott Michaels, TMT...


TMT Instrumentation Cryogenic Cooling System Moves on to the Final Design Phase

June 18th, 2020

The Thirty Meter Telescope recently reached another critical development milestone with the successful Conceptual Design Review close-out meeting of the Cryogenic Cooling System (CRYO). The online...


TMT’s M1 Metrology Frame in Production

April 29th, 2020

The first TMT primary mirror (M1) metrology frame has been built and delivered to TMT’s technical laboratory near Pasadena. TMT will use the metrology frames, which are auxiliary equipment tools,...


TMT Reaches Major Milestone with Completion of Fully Populated Mirror Segment Prototypes at the Multi-Segment Integration & Test Facility (MSIT)

March 6th, 2020

The Multi-Segment Integration & Test (MSIT) facility at the TMT lab in Monrovia, California, is now fully populated with seven aluminum mirror segment prototypes.


Successful Receiving Inspection of 18 Mirror Blanks in India

February 6th, 2020

One of TMT’s most important components – its huge primary mirror that spans over 30 meters – continues to be manufactured around the world.


TMT Tertiary Mirror Passes Preliminary Design Review

January 22nd, 2020

Pasadena, CA, January 13, 2020 – The design of the Thirty Meter Telescope’s Tertiary Mirror (M3) recently passed the first part of its Preliminary Design Review, which took place over two days in...


Primary Mirror Segment Production has started at Coherent

January 21st, 2020

Coherent Inc., one of the world’s leading providers of lasers and laser-based technology, is now ready to polish all of the TMT primary mirrors segments to be manufactured in the United States.


TMT Observatory Safety System Passes Preliminary Design Review

December 20th, 2019

TMT recently achieved another significant milestone, with the successful preliminary design review of the Observatory Safety System (OSS). The review material was presented by TMT engineers Jimmy...


TMT Project Engineers at Vertical Laboratories in California test TMT Warping Harness Components

November 13th, 2019

The leaf springs required for TMT warping harness mechanism, supporting each one of the 492 primary active segments, are being tested and validated in an Environmental Simulation Laboratory.