The Maunakea Observatories are a collaboration of nonprofit independent institutions with telescopes located on Maunakea on the island of Hawai‘i. Together, the Observatories make Maunakea the most scientifically productive site for astronomy world-wide.

The telescopes on Maunakea are operated by 12 separate nonprofit observatories. Each has its own strengths with varying fields of view and sensitivities to light from radio to ultraviolet wavelengths. They are all important to the scientific productivity of Maunakea.

Thirty Meter Telescope (TMT)


TMT is a nonprofit partnership between California Institute of Technology (Caltech), University of California, and governmental research institutions representing the partner countries of Canada, China, India and Japan. With its 30m primary mirror, TMT is among the next generation of near-infrared, visible-light large telescopes. Once built on Maunakea, TMT will provide unparalleled resolution with images more than 12 times sharper than those from the Hubble Space Telescope, and enable new discoveries in essentially every field of astronomy and astrophysics.  

Learn More About TMT

Why Maunakea is the perfect site for astronomy research

To fully appreciate the ‘ohana of observatories, it is important to understand all the elements that, together, make Maunakea the world’s premier site for astronomy research. The mountain’s high altitude, gentle slopes, calm air and dark skies allow for the clearest visibility on Earth for astronomical observation.

Maunakea Is Unique