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The unit operates two IMAX theaters and one Infiniti Digital Dome Planetarium, each presenting shows relevant to the museum in which it is located. The Lockheed Martin IMAX Theater is the flagship facility of Smithsonian Theaters and is located on the first floor of the National Air and Space Museum at the National Mall Campus in Washington, D.C.
Light pollution from surrounding Washington, D.C., has limited viewing celestial bodies from the location. On July 2, 1973, the Observatory was designated as a U.S. national landmark National Register of Historic Places.
The telescope used for the discovery of the Moons of Mars was the 26 inch (66 cm) refractor telescope, then located at Foggy Bottom, Washington, DC. [19] In 1893 it was moved to its Northwest DC location. [20] Naval Observatory Flagstaff Station. In 1934, the largest optical telescope installed at USNO saw "first light".
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The museum's prominent site on the National Mall once housed the city's armory, which became Armory Square Hospital during the Civil War; it nursed the worst wounded cases who were transported to Washington after battles. [6] The rest of the site was occupied by a cluster of temporary war buildings that existed from World War I until the 1960s. [7]
With Davis at the head, the observatory's exact time-keeping was used to standardize the time not only across Washington, D.C. but also around the country. Telegraph lines were laid by 1869 to the Navy Department, the Washington fire bells, and, thanks to the Western Union Telegraph Company, nearly all railroads operating in the southern states.