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.

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.

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.

Did you know ...?

Read the continuing story about how TMT is the best in the world at what it does.

Latest From TMT

10d5b2175fbd587f49c2971391c1ce7ba064c845
New York Times article quotes TMT's Executive Director Robert Kirschner
June 4th, 2025

If we do nothing, Europe will lead in the South and China in the North. We have led astronomy and astrophysics for 100 years to very good effect. This is not the moment to lose U.S. leadership.

23d35e9efcb7349259add39d8a48c67f901bcdce
TIO Response to NSF FY 2026 Budget Request to Congress
June 4th, 2025

The Thirty Meter Telescope (TMT) International Observatory is one of the most compelling opportunities for discovery in this generation for the United States to demonstrate global leadership in astronomy, and for partnerships with communities desiring to shape the future jointly.

C5c76ae9e265d72e2b74309402e3d940016d8e83
TIO Staff Enjoyed AstroDay Hilo
May 4th, 2025 Education & Outreach

TIO staff enjoyed their time at AstroDay Hilo.