In 1925, astronomer Dr. Franz Kaiser founded the URANIA Wiesbaden Astronomical Society together with Wiesbaden astronomy enthusiasts and led it until his death in 1962. During the first decades, the URANIA had a powerful refractor at its disposal in the Oranienschule observatory. At the end of the Second World War, the observatory was destroyed and the association's work came to a standstill.

It was not until 1954, after the observatory dome had been restored, that observation work could be resumed. In 1967, the acquisition of a new 30 cm Maksutov reflector telescope meant that activity at the observatory was once again intensified. In addition to the usual observation evenings, lectures and seminars, "Astronomical Weeks" and major events were added. The cooperation with the Volkshochschule Wiesbaden e.V. also became ever closer. In 1974, the URANIA Astronomical Society had the opportunity to move into a new observatory, which was built as part of the construction of the new upper secondary school at Moltkering (Martin-Niemöller-Schule).

The URANIA Astronomical Society has set itself the main task of maintaining and promoting astronomy and celestial science. Interested visitors have the opportunity to take part in observations and lectures several times a week. Major events are also organized. The URANIA Astronomical Society was the organizer of the "Wiesbaden Astronomy Fair" in 1985 and 1987, with a large number of exhibitors from Germany and abroad.

In 1992, a high-performance refractor with 206 mm aperture and 1575 mm focal length was purchased. In 1995, the URANIA Astronomical Society erected a small new building directly opposite the current entrance to the observatory on the school grounds. The 30 cm reflector telescope was also reinstalled there.

The observatory is visited by around 1,500 people every year. The URANIA currently has around 80 members.