Petrovaradin Fortress accommodates also the Novi Sad Astronomy Observatory with PLANETARIUM, which is the only one in Serbia together with the Belgrade Planetarium. The scientific and educational activities of the Planetarium are managed by the Astronomic Society Novi Sad that organises for visitors, in particular pupils and students, the audio-visual lectures in astronomy and similar scientific disciplines.

The Planetarium is open to public visits on Thursdays from 08.00 p.m. and entrance is free. All the information, confirmation of the schedule for public visits and announcements of group visits can be obtained directly from the Astronomic Society of Novi Sad, phone: +381 063 845 53 71,