The Thirty Meter Telescope (TMT) is a 30-meter Adaptive Optics, Segmented-mirror-reflecting Extremely Large Telescope plan, intended for Mauna Kea, Hawaii, for first light in 2022. Site construction was delayed for some time, with the possibility of relocation to Canary Islands, but as of 2017, plans are proceeding to built it at the Mauna Kea Observatories, with parts construction proceeding.
Adaptive Optics (AO)
Extremely Large Telescope (ELT)
Mauna Kea Observatories (MKO)
United Kingdom Infrared Telescope (UKIRT)