John Payson Williston Observatory
 The Williston Observatory, circa 1945-1955 | |||||
| Organization | Mount Holyoke College | ||||
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| Location | South Hadley, Massachusetts, United States | ||||
| Coordinates | 42°15′21.83″N 72°15′21.83″W / 42.2560639°N 72.2560639°W | ||||
| Altitude | 231 feet | ||||
| Weather | South Hadley Weather | ||||
| Established | 1881[1] | ||||
| Website | [1] | ||||
| Telescopes | |||||
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  Location of John Payson Williston Observatory | |||||
The John Payson Williston Observatory is an astronomical observatory located at the highest point on the Mount Holyoke College campus. Constructed in 1881, the observatory is a modest building with a 24-inch Ritchey-Chretien reflector optical telescope. It is maintained and operated by the Mount Holyoke College Astronomy Department.