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Thirty Meter Telescope

Astronomy's Next-Generation Observatory

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

September 18th, 2020 • News
TMT Acknowledges the California Fires and Mount Wilson
August 11th, 2020 • News
Latest Update from TMT
September 8th, 2020 • News
TMT Optical Cleaning System Reaches Design Milestone
September 2nd, 2020 • Science Talk
Astronomy Talk: Modern Astronomy On Maunakea: A 60-Year Story (1960-2020)
September 8th, 2020 • Artwork
Layout of one Robotic Cleaning Arm for TMT Primary Mirror
April 28th, 2020 • News
Scientists Attend First TMT-GMT Joint Science Advisory Committee Meeting
September 8th, 2020 • Artwork
Layout of TMT Primary Mirror Surface Cleaning
August 18th, 2020 • Associate Project Manager Blog
Meet the TMT Team: Interview with Caty Pilachowski
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July 23rd, 2020 • Artwork
Rendering of the Thirty Meter Telescope Layout
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June 18th, 2020 • Artwork
Rendering of TMT’s Cryogenic Cooling System (CRYO) Envelopes on the telescope Nasmyth P...
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June 26th, 2020 • Artwork
TMT Engineering Sensors on the Telescope Structure
Crosssectionalviewwfos instrument
July 23rd, 2020 • Artwork
Detailed cross-sectional view of the WFOS Instrument
July 16th, 2020 • Science
TMT Site Characteristics Webinar, 8 July 2020
July 23rd, 2020 • News
Conceptual Design of TMT’s Wide-Field Optical Spectrometer Instrument Progresses
June 26th, 2020 • News
TMT Engineering Sensors System Advances to Final Design Phase
June 18th, 2020 • News
TMT Instrumentation Cryogenic Cooling System Moves on to the Final Design Phase
May 28th, 2020 • News
Latest Poll Shows 2-1 Margin in Support of TMT on Maunakea
May 20th, 2020 • News
TMT Donates Masks to the Friends of the Children's Justice Center of East Hawaii
May 14th, 2020 • News
TMT Sponsors $50,000 for Online STEM Learning Program in Hawaii
April 29th, 2020 • News
TMT’s M1 Metrology Frame in Production
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April 23rd, 2020 • Photograph
Cross-section view of TMT Enclosure
April 23rd, 2020 • News
TMT Telescope Enclosure Ready for Production
April 21st, 2020 • News
The Food Basket Receives $100,000 Donation From TMT To Meet Growing Demand For Food As...
March 23rd, 2020 • News
Testing of TMT’s Primary Mirror Segment in Progress
March 6th, 2020 • News
TMT Reaches Major Milestone with Completion of Fully Populated Mirror Segment Prototype...
March 6th, 2020 • News
Installation of TMT mirror segment prototype on the MSIT facility at TMT technical lab ...
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January 7th, 2020 • Photograph
US ELT Group Picture from AAS 235
November 15th, 2019 • News
TMT Science Forum 2019 in Xiamen, China
July 9th, 2019 • News
Coffee Chat on Mirror Segment Fabrication

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

TMT Acknowledges the California Fires and Mount Wilson
September 18th, 2020

Many major wildfires are devastating lands and homes across the entire west coast, including in California, Oregon and Washington. Although wildland fires are common at this time of the year, the fires experienced this summer are among the region’s most destructive.

TMT Optical Cleaning System Reaches Design Milestone
September 8th, 2020 Engineering & Technology

TMT Optics and Systems Engineering teams recently conducted a technical evaluation of the primary mirror optical cleaning system, marking a major milestone in its design. The Optics Cleaning System (CLN) for TMT’s segmented primary mirror (M1) as well as the secondary (M2) and tertiary (M3) mirrors successfully passed Preliminary Design Review (PDR) on August 19 and 20, 2020 during a remote conference meeting.

Latest Update from TMT
August 11th, 2020 Science & Astronomy

An important project for the global astronomy community, TMT is working collaboratively with the Giant Magellan Telescope (GMT) and the National Science Foundation’s (NSF’s) National Optical-Infrared Astronomy Research Laboratory (NOIRLab) to develop a U.S.-Extremely Large Telescope Program (US-ELTP).

Conceptual Design of TMT’s Wide-Field Optical Spectrometer Instrument Progresses
July 23rd, 2020 Engineering & Technology

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 instrument’s progress to date and to provide guidance on potential work needed to successfully complete the technical and scientific aspects to bring the overall design to a full Conceptual Design level.

TMT Engineering Sensors System Advances to Final Design Phase
June 26th, 2020 Engineering & Technology

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 telescope control and software engineers, led a team of four people in presenting the design to the review panel.