The principal projector "Cosmorama" was installed at that period. Like its two predecessors and its successor this projector was developed and constructed by the company Zeiss Jena. Later "Cosmorama" was set up as a technical monument in the Goethe-Gallery Jena where nowadays, it is documenting important developmental periods of the town being a centre of optical industry as well as of the company Carl Zeiss in the context of planetarium technique.

The most important part of another extensive modernisation of dif-ferent technical equipment was the projector "Universarium" model VIII. Since late autumn 1996 this projector has dominated the centre of the Zeiss-Planetarium's dome-shaped hall as its most striking technical object. Its intelligent highly-qualitative technique renounces on mechanical gear units to project planetary mouvements as it was done in the past. "Universarium" is the first digitally directed star projector working with light-conducting fibres and thus opening really new technical dimensions. Movements are directed by electrical stepping motors. They can perform many different constellations of celestial bodies as well as the biggest time differences in a few seconds. It is comparatively easy to change the visitor's position, to choose Venus or Jupiter for instance as optical points of view or to leave the solar system virtually. Slides, video, panoramic or all-sky views can be projected together on the dome without causing any light faintness of the stellar performance. Light-fibre optic makes possible to heighten the stellar light intensity a hundred times and in parallel to reduce the diametre of a star disc. The result is a natural radiation effect. An ensemble of slide- and effect projectors, sound technique, a laser multivision and video big-size-projector installation complete the technical equipment of the house.

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