Large Millimeter Telescope

The Large Millimeter Telescope (or Gran Telescopio Milimétrico Alfonso Serrano) is the world´s largest single-dish steerable millimetre-wavelength telescope designed specifically for astronomical observations in the wavelength range of 0.85 – 4mm. This binational project between México and the United States of America represents the largest and most complex scientific instrument constructed in México. Situated on the summit of Volcán Sierra Negra at an altitude of 4600 meters, the LMT has begun its exploration of the physical processes that lead to the formation and evolution of planetary systems, stars, black-holes and galaxies thoughout the 13.7 billion year history of the Universe.

July 10, 2024 – Access to the LMT site road reopened

The LMT is happy to report that the recent successful negotiations between INAOE and the Texamalaquilla community have resulted in the reopening of our access to the LMT site road and the LMT on the summit of Sierra Negra. Consequently we are now in the process of cooling down the suite of scientific instrumentation and […]

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June 20, 2024 – The Large Millimeter Telescope is currently closed

The Large Millimeter Telescope (LMT) is currently closed due to our inability to reach the telescope site (Sierra Negra) via our normal high-altitude site road (above 3300m). During the last few weeks, the residents of Texmalaquilla, the last village that the LMT staff and visiting scientists travel through to gain access to our site road, […]

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