New York, June 2025 – Following a two-year renovation, the Prague Planetarium is reopening to the public with a transformed guest experience. The result of the modernisation project is the first fully digital LED planetarium in Europe and the largest in any planetarium worldwide, which ranks among the absolute best in the world in terms of quality. “Visitors will find the experience to be truly unparalleled. Unanimously, all those to whom the system has been demonstrated have been astounded,” says Jakub Rozehnal , director of Planetum.
A technological revolution under the dome
Powered by Cosm Technology , the Prague Planetarium upgraded its experience with a CX System LED dome display featuring approximately 45 million diodes across more than 12,000 custom-designed panels.This new LED dome delivers a visually stunning representation of the universe, inviting audiences to experience the most immersive, top-quality astronomy simulations and scientific visualizations in the world. In comparison to traditional projectors, LED panels boast up to a hundred times the light output , enabling the creation of unparalleled contrasts and realism in planetariums. This innovative technology allows us to create the illusion of a 3Dexperience even on a 2D surface to transport guests entirely. In comparison with conventional projection systems, the new technology also has approximately four times the service life .
“Prague Planetarium has positioned itself as a global leader in immersive science and cultural experiences with the installation of Cosm’s CX System LED dome technology,” said Kirk Johnson, Chief Operations Officer at Cosm. “With the flexibility and visual quality of CX System, the planetarium has unlocked a new level of visual depth, clarity, and realism that transform show audiences engage with science,space, and culture. Driven by the forward-thinking leaders at Prague Planetarium,this extensive modernization sets an international benchmark for what planetarium scan deliver – one that will influence institutions around the world for years to come,” said Kirk Johnson, Chief Operations Officer at Cosm, parent company of Evans &Sutherland.
Renovation in numbers
The total investment amounted to CZK 300 million (USD 12.5 million) , of which approximately CZK 200 million was spent on the construction of the dome and LED
technology. The remainder of the budget was allocated to construction work related to the expansion and modernisation of visitor facilities , as well as the modernisation of the ventilation and heating systems. The project was financed from the budget of the City of Prague , Planetum’s founder.
“Thanks to this investment, Prague is gaining a centre that is unparalleled in the world—not only for popularising astronomy, but also for cultural and educational projects of the future,” said Daniel Mazur, Councilor for Smart City, IT, Science, and Research of the City of Prague.
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