The Thirty Meter Telescope (TMT) Project will design and build a thirty-meter diameter telescope for research in
astronomy at optical and infrared wavelengths. TMT is a partnership between the University of California, Caltech, and
the Association of Canadian Universities for Research in Astronomy (ACURA). The $80 million TMT design and
development phase is fully funded and Preliminary Design is in progress. An additional $300 million has been pledged
towards early TMT construction which will commence in 2009. We include a high level description of the design of the
telescope and its planned adaptive optics and science instrumentation. The schedule of key milestones for completing
the design and construction is summarized.© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.