The Minnesota Astronomical Society (MAS) began in 1972, known at the time as the Twin Cities Astronomy Club. The MAS currently has five observing sites centered around the Twin Cities metro area. The Onan Observatory located in Baylor Regional Park, houses more than a dozen telescopes on four observing platforms available for use by our more than 400 members and public outreach. The observatory is open to the public and MAS members at scheduled times during the year. Onan public star parties are all-weather events, assuring the observatory will be open to visitors.

Other MAS Member sites include Metcalf Field and the Joseph J. Casby Observatory in the east metro area, Cherry Grove Observatory south of the Twin Cities and to the north, the Long Lake Conservation Center.

• Onan Observatory website:
• MAS Events: