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’s 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.
The Thirty Meter Telescope (TMT) International Observatory (TIO) is pleased to announce the successful completion of Final Design Review–1 (FDR-1) for the InfraRed Imaging Spectrograph (IRIS), held on December 8–9, 2025.
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 7–8, 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 11–12, 2025.
The Thirty Meter Telescope Secondary Mirror support and positioner assembly design is now complete
Timelapse videos of the testing of the segment support assembly.
TIO passed the final design review of systems designed to cool the telescope and instruments during operations.
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