Editing Lowell Observatory (section)

=== Other ===
The observatory operates several [[telescope]]s at three locations in the Flagstaff area. The main facility, located on Mars Hill just west of downtown Flagstaff, houses the original {{convert|24|in|cm|adj=on|abbr=off|order=flip|sp=us}} Clark Refracting Telescope, which is now used for public education, with 85,000 annual visitors. The telescope, built in 1896 for $20,000, was assembled in Boston by [[Alvan Clark & Sons]] and then shipped by train to Flagstaff. Also located on the Mars Hill campus is the {{convert|13|in|cm|adj=on|abbr=off|order=flip|sp=us}} Pluto Discovery Telescope, used by [[Clyde Tombaugh]] in 1930 to discover the dwarf planet [[Pluto]].

In 2014, the {{convert|8,000|ft2}} Putnam Center was opened.<ref>{{cite web |title=Putnam Collection Center |url=https://lowell.edu/history/putnam-collection-center/}}</ref> This observatory included many rooms with tools that were useful to observers including a library for research, a room for processing photographic glass plates, multiple antique instruments used by previous astronomers, and many artifacts. The observatory does contain areas that are closed to the public view, although there are multiple places that tourists are welcome to visit.<ref name="History" />

Lowell Observatory currently operates four research telescopes at its [[Anderson Mesa Station|Anderson Mesa]] dark-sky site, located {{convert|20|km|mi|abbr=on}} southeast of Flagstaff, including the {{convert|72|in|cm|adj=on|abbr=off|order=flip|sp=us}} Perkins Telescope (in partnership with Boston University) and the {{convert|42|in|cm|adj=on|abbr=off|order=flip|sp=us}} John S. Hall Telescope. Lowell is a partner with the [[United States Naval Observatory Flagstaff Station|United States Naval Observatory]] and [[United States Naval Research Laboratory|Naval Research Laboratory]] in the [[Navy Optical Interferometer|Navy Precision Optical Interferometer]] (NPOI) also located at that site. The Observatory also operates smaller research telescopes at its historic site on Mars Hill and in Australia and Chile.

Past Anderson Mesa, on the peak of [[Happy Jack, Arizona|Happy Jack]], Lowell Observatory built the {{convert|4.28|m|in|adj=on|abbr=off|sp=us}} [[Lowell Discovery Telescope]] in partnership with Discovery Communications, Inc.