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It was moved to Anderson Mesa in 1961, and was purchased by Lowell in 1998. Lowell and BU formed a partnership to operate the telescope that year, and GSU joined later. The original 69-inch mirror, which was figured by J. W. Fecker, Inc., was the largest single piece of glass ever cast in America when it was poured. It was replaced in 1965 with the current mirror made of Duran-50 low-expansion glass.
* The 1.07 m John

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