DSE operates its own astronomical observatory NOVA. It is located in the inner part of Vestfold county in south-east Norway, far from streetlights and other light pollution. NOVA is placed at a mountaintop 350 metres above sea level, and has excellent view in all directions. NOVA consists of three buildings named after stellar objects: Vega, Phoenix and Sirius. Vega and Phoenix are the observatory buildings, while Sirius is a sleeping cabin.

All together, there are four big telescopes at NOVA of sizes ranging from 8 to 16" (20 to 40 cm) mirror diameter. The observatory is Norway's largest in its class. The society often invites their members to star parties at NOVA. Type 1 members are able to use the observatory on their own. The society also makes courses for their members at NOVA, like practical use of the telescopes, photographing, etc. School classes and other groups visit NOVA on special nights. On special occasions (like comet passages, eclipses, meteor showers etc.), the observatory will be open to visitors.

Til sammen finnes det fire store teleskoper på NOVA med fra 20 til 40 cm speildiameter. Observatoriet er Norges største i sitt slag. Foreningen inviterer ofte medlemmene til observasjonskvelder på NOVA. Som type 1-medlem kan du også benytte observatoriet på egen hånd. Foreningen holder også kurs for medlemmene på NOVA. Det kan være kurs i kikkertbruk, fotografering, med mer. DSE har ofte egne kvelder for skoleklasser eller andre grupper. I tillegg åpner vi dørene for publikum ved passende anledninger, som under formørkelser, kometpassasjer, meteorstormer eller liknende.