• Book a date ahead on the observatory's calendar: public sessions usually fall on weekday evenings and open one at a time as the forecast allows, and a place counts once the bank transfer arrives
• Groups of 7 to 15, so a session only goes ahead once at least 7 people have signed up
• Cloudy night, new date: if the weather rules out viewing, visitors are offered a replacement session

A school observatory on the roof of the Deutsche Schule Bratislava, opened to the public in 2024. Guides take small groups into the dome to look through a 40 cm mirror telescope at the night sky.

A separate solar telescope with a narrowband filter shows the Sun's surface, flares and prominences included, so daytime sessions are possible too.