Thirty Meter Telescope

Astronomy's Next-Generation 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

7ffdfbdd1fecfc215eb387b3f8ef42a8f12924b1
TIO is considering the Spanish offer
July 31st, 2025

We remain committed to securing the best possible site and will evaluate Spain’s offer thoroughly and promptly.

1cdf61432d5d8f433e92706948157f1b68a73de4
TMT Secondary Mirror Metrology & Polishing Begins
July 28th, 2025

The work on the secondary mirror polishing for the Thirty Meter Telescope (TMT) has begun.