The oldest Observatory in the United States:Lowell Observatory
is located in Flagstaff, Arizona. It was built in 1894. It is the oldest Observatory in the United States. In 1965, it was designated as the national historic site of the United States. Every year, about 70000 tourists take part in the guided tour arranged by the observatory in the daytime, and then watch the wonderful scenery in the night sky through Clark telescope and other telescopes in the evening.
The Lowell Observatory was founded by Percival Lowell, an astronomer of the Lowell family in Boston. At present, there are four telescopes for research purposes, the most famous of which is a telescope installed in 1896. Clyde Tombaugh used this telescope to discover Pluto in 1930. Lowell Observatory has made great contribution to the exploration of the universe. Scientists have found Pluto, Uranus ring, the period of luminosity change of Halley comet, the three largest stars and confirmed the orbit of two Pluto satellites.
In the starry night, visitors will have the chance to see the vast sky through the marvelous telescope of Lowell Observatory, and the galaxies that exist in the universe but cannot be seen by the naked eye.
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