Cincinnati Observatory Center
3489 Observatory Place
Cincinnati, Ohio 45208
(513) 321-5186
Contact: www.CincinnatiObservatory.org/contact
The Cincinnati Observatory Center is the oldest operating professional observatory in the United States. Operating since 1842, the observatory is a National Historic Landmark and houses two historic telescopes. The 1842 12-inch Merz und Mahler is possibly the oldest continually-used telescope in the world and is the oldest professional telescope in the Western Hemisphere still in use. It is used for most of their public star gazes.
Their “new” scope is the 16-inch 1904 Alvan Clark & Sons refractor — which provides wonderful views of the planets and the moon — and tracks with a weight-driven mechanical clock drive.
For more information about the Observatory, including an extensive history, historic tours, public and private star gazing, facility rental and special events, contact the observatory by email or visit their Web site.
Observatories of Ohio 
Hello. While Observatories of Ohio endeavors to document Ohio’s facilities, we do not operate any observatories or offer programming.
Please contact the Cincinnati Observatory Center via the following:
https://www.cincinnatiobservatory.org/contact/