TIO is excited to announce the successful completion of the Secondary Mirror Metrology & Polishing Final Design Review.
The TMT Optics team is excited to announce the successful completion of the ITCC鈥檚 Stress Mirror Polishing Fabrication Readiness Review (FRR).
The TMT Laser Guide Star Facility (LGSF) team is excited to announce the successful completion of their Final Design Review 1. The review was held at the TIO Project Office on January 21-22, 2026 and included both in-person and remote attendees.
A new collection of international white papers submitted to 鈥淓SO Expanding Horizons: Transforming Astronomy in the 2040s鈥� showcases the extraordinary scientific potential of a 30鈥�40 meter class Extremely Large Telescope (ELT) in the Northern Hemisphere and highlights the unique contribution the Thirty Meter Telescope would make to global astronomy.
The Thirty Meter Telescope (TMT) International Observatory (TIO) is pleased to announce the successful completion of Final Design Review鈥�1 (FDR-1) for the InfraRed Imaging Spectrograph (IRIS), held on December 8鈥�9, 2025.
TMT is exploring a promising avenue for a new observatory based in Spain.
The Thirty Meter Telescope (TMT) International Observatory (TIO) is pleased to announce that the Multi-Object Diffraction-limited High-resolution Infrared Spectrograph (MODHIS) has successfully completed its Conceptual Design Review (CoDR).
The Thirty Meter Telescope (TMT) International Observatory (TIO) is delighted to announce the successful completion of the Preliminary Design Review 1 (PDR-1) for the Wide Field Optical Spectrograph (WFOS), held on August 7鈥�8, 2025, at the TIO Project Office in Pasadena, California, and via Zoom.
The Tertiary Mirror Support System and Positioner Assembly (M3SSPA) has now successfully completed its Preliminary Design Phase after the Preliminary Design Review (PDR) was held at NOIRLab in Tucson, Arizona on August 11鈥�12, 2025.
TIO team members attended last week鈥檚 conference on the Habitable Worlds Observatory (HWO; a NASA missoin designed to look for signs of life on planets orbiting other stars), where they shared insights on segmented mirror technology and next-generation instrumentation.
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