10 years. The telescope's unique enclosure was designed by Dynamic Structures Ltd. in British Columbia. In a 2019 online petition, a group of Canadian academics called on succeeding Canadian Prime Minister Justin Trudeau together with Industry Minister Navdeep Bains and Science Minister Kirsty Duncan to divest Canadian funding from the project. The Canadian astronomy community has named TMT its top facility priority for the decade ahead. Design The TMT would be housed in a general-purpose observatory capable of investigating a broad range of astrophysical problems. The total diameter of the dome will be with the total dome height at (comparable in height to an eighteen-storey building). The total area of the structure is projected to be within a complex. Telescope The centerpiece of the TMT Observatory is to be a Ritchey-Chrétien telescope with a diameter primary mirror. This mirror is to be segmented and consist of 492 smaller (1.4 metre; 4'6"), individual hexagonal mirrors. The shape of each segment, as well as its position relative to neighboring segments, will be controlled actively. A secondary mirror is to produce an unobstructed field-of-view of 20 arcminutes in diameter with a focal ratio of 15. A 3.5 × 2.5 metre (12' x 8') flat tertiary mirror is to direct the light path to science instruments mounted on large Nasmyth platforms. The telescope is to have an alt-azimuth mount. Target acquisition and system configuration capabilities need to be achieved within 5 minutes, or ten minutes if relocating to a newer device. To achieve these time limitations the TMT will use a software architecture linked by a service based communications system. The moving mass of the telescope, optics, and instruments will be 1430 tonnes. The design of the facility descends from the Keck Observatory. Adaptive optics Integral to the observatory is a Multi-Conjugate Adaptive Optics (MCAO) system. This MCAO system will measure atmospheric turbulence by observing a combination of natural (real) stars and artificial laser guide stars. Based on these measurements, a pair of deformable mirrors will be adjusted many times per second to correct optical wave-front distortions caused by the intervening turbulence. This system will produce diffraction-limited images over a 30-arc-second diameter field-of-view, which means that the core of the point spread function will have a size of 0.015 arc-second at a wavelength of 2.2 micrometers, almost ten times better than the Hubble Space Telescope. Scientific instrumentation Early-light capabilities Three instruments are planned to