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- TMT's Technical and Scientific Heritage
- Science Themes
- TMT International Science Development Teams
- Information for TMT Observers
- Science Advisory Committee (SAC) webinars
- TMT Science Forums
- Fundamental Physics and Cosmology
- Early Universe, Galaxy Formation and the IGM
- Supermassive Black Holes
- Milky Way and Nearby Galaxies
- Stars, Stellar Physics and the Interstellar Medium
- Formation of Stars and Planets
- Exoplanets
- Our Solar System
- Time Domain Science
- Overview of Instrument Capabilities
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Thirty Meter Telescope
Highlights
Explore the latest news, events and announcements from the TMT International Observatory
TMT's Mission and Values
TMT is committed to a community model of astronomy based on the values of respect and mutual stewardship.
Did you know ...?
Read the continuing story about how TMT is the best in the world at what it does.
Maunakea and the Community
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's Science and Technology
TMT is an extraordinary international scientific endeavor that will revolutionize our understanding of the universe and our place within it.
Latest From TMT
Global Astronomy Community Articulates the Scientific Case for a Northern Hemisphere Extremely Large Telescope
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.
TMT IRIS FDR-1 Successfully Completed
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 Explores a Promising Path Forward in Spain
TMT is exploring a promising avenue for a new observatory based in Spain.
