TMT is committed to a community model of astronomy based on the values of respect and mutual stewardship.
Read the continuing story about how TMT is the best in the world at what it does.
Maunakea is a truly unique place and TMT is part of the Hawaiʻi community and firmly believes it is our kuleana (responsibility) to be active supporters of that community.
TMT is an extraordinary international scientific endeavor that will revolutionize our understanding of the universe and our place within it.
A new collection of international white papers submitted to “ESO Expanding Horizons: Transforming Astronomy in the 2040s” showcases the extraordinary scientific potential of a 30–40 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–1 (FDR-1) for the InfraRed Imaging Spectrograph (IRIS), held on December 8–9, 2025.
TMT is exploring a promising avenue for a new observatory based in Spain.
