Since its creation in 1973, the CfA has been headquartered in Cambridge, Massachusetts, where nearly 300 scientists and 400 supporting staff examine the origin and evolution of the Universe. The main building is located at 60 Garden Street (also home to the John G. Wolbach Library), but the CfA has expanded to three other Cambridge locations.
Located on Mt. Hopkins near Amado, Arizona in the Santa Rita Mountains, 56 kilometers (35 miles) south of Tucson, the Fred Lawrence Whipple Observatory is SAO's largest field station. FLWO is also home to the MMT Observatory.
The Submillimeter Array (SMA) is the world's first imaging interferometric telescope to operate in the major atmospheric windows from 0.3mm to 1.3mm. Located at the summit of Mauna Kea 13,386 feet above sea level, the array consists of eight 6-m movable antennas that can be positioned in different locations to provide highest angular resolution equivalent to an antenna of 0.5 km (0.3 miles) across.