Walter Hohmann Observatory

Walter-Hohmann Observatory Essen e.V. – Astronomy for the Public

The Walter-Hohmann Observatory Essen e.V. is a non-profit association founded in 1969 by amateur astronomers from Essen and the surrounding region. Its aim is to communicate astronomical knowledge in an accessible way and to foster a lasting interest in science, space travel and exploring the cosmos. It does so in particular through skywatching, talks and educational activities for the general public.

Since 1971, the association has borne the name of Essen’s city planning officer Walter Hohmann (1880–1945), an important pioneer of modern space travel. Hohmann developed the Hohmann transfer orbit, named after him, a fundamental concept for energy-efficient spaceflight trajectories that is still used in space missions today.

The observatory has been located at its current site in the Essen district of Schuir since 1978. The complex includes an association and lecture building, as well as an outdoor area opposite with an observing dome and several modern observatories with sliding roofs.

A regular feature of the programme is the open observing evenings: every Wednesday from 8 pm, observatory members are available to answer questions about astronomy. Guided skywatching takes place when skies are clear—or when there are sufficiently large breaks in the clouds. No advance booking is required. Individual appointments can also be arranged for school classes, associations and other groups.

Through its ongoing commitment, the Walter-Hohmann Observatory makes an important contribution to astronomy education in the Ruhr region and offers an accessible way to engage with science and research—right beneath the starry sky.