| Brussels Planetarium | |
| Address: | French: Avenue de Bouchout|italic=no / Dutch; Flemish: Boechoutlaan|italic=no 10 |
| Location Town: | 1020 Laeken, City of Brussels, Brussels-Capital Region |
| Location Country: | Belgium |
| Coordinates: | 50.8933°N 4.3375°W |
| Building Type: | Planetarium |
The Brussels Planetarium (French: Planétarium de Bruxelles; Dutch; Flemish: Planetarium van Brussel) of the Royal Observatory of Belgium is a planetarium located on the Heysel/Heizel Plateau in Laeken (northern part of the City of Brussels). It was established during the Brussels International Exposition of 1935 as the Alberteum and is now part of the institutions of the Belgian Federal Science Policy Office.
The Brussels Planetarium is one of the most important planetariums in Europe and a leading attraction in Belgium. The planetarium has an international scientific reputation, and is one of the largest in Europe, with its dome of in diameter,[1] on which the Sun, the Moon, the planets, the Milky Way and more than 8,500 stars can be projected.
The Zeiss UPP 23/5 projector of the planetarium was made up of 119 projectors and was built by the Carl Zeiss company of Jena.[2] In April 2021, the planetarium opened its newly renovated dome, equipped with eight state-of-the-art Barco projectors. The projectors were installed by RSA Cosmos, who also provided the latest version of its powerful astronomical software, SkyExplorer 2021.[3]