Our Planetarium What is a planetarium? A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy, space science and the night sky, or for training in celestial navigation. When was it established? Established in 1965 by the State Engineering Corporation and declared open on 1st of February, 1965 for Ceylon Industrial Exhibition to introduce the latest technologies specially to show the capability of creating a night sky. Who was the architect? Former Dr. A. N. S. Kulasinghe. What is the total seating capacity of the Sri Lanka planetarium? Seating capacity is 570 and placed centrically. H ow is night sky created in the planetarium dome? Night sky is created by the universal projector. What kinds of projectors are used? Carl Zeiss universal projector for star projections.