To project the images of the celestial objects the planetarium object is used. Carl Zeiss Jena Company in Germany designed and built the first planetarium projector between 1923 to 1925. And the projector has grown more complex. A set of a fixed star, moon, sun, and planets, and then the various nebulae are the smaller projects over the production. Comets and then the other larger section of stars are known to be the larger sections of the thing. Around the outside of the screen, additional projectors can be added for the twilight which completes with city or the country scenes. A great example of a star projector is known to be a planetarium projector. Photographic slides, laser displays, and other images, constellations, and coordinate lines are added to the other projectors. To operate on the planetarium screens the Omnimax movie system was originally designed.
The stage of a planetarium in the 1960s:
The universal projection planetarium type 23/6 is known to be the very good example for the typical planetarium projector in the year 1960s which was invented by VEB Carl Zeiss Jena. 13 foot long and dumbbell-shaped object with twenty-nine-inch diameter sphere was named as the planetarium projector attached at each end that represents the night sky for southern and northern hemispheres. One hundred and fifty individual projectors were held by connecting the two spheres as a framework. That framework was dedicated to the sun, the planets, and the specific stars. Almost four thousand and five hundred stars per hemisphere held the representation of each globe. The tiny holes created the stars that were punched into the copper foils. Starfield plate was created by two glass plates that were held the foils between each other. In the center of the part, the 1500 watt lamp was placed and then each globe was illuminated.
Development of the planetarium system projector in recent days:
In the year 1983, an American computer firm named Evans and Sutherland Digistar released a single projector with the fisheye lens which helps to show the star from the view of the earth’s surface. That helps to show the celestial bodies accurately and travel through the stars at different times as well as in the past and also in the future. The offerings are broadened by the planetaria or the domes theatres in the recent days to include widescreen and laser drawn patterns are combined with music with laser shows. Digester 6 is known to be the new generation of Evans and Sutherland and the fully digital projection system is offered by global immersion’s fidelity or Sky Skan’s digital sky. To create the scene provided to it by the computer with the system of digital video or the laser video projector around the edge of the dome. Tremendous flexibility was given to the operator not only for the view of the modern sky from the earth but also for any of the images they want to see. That is not only from the earth but also from the high distance in space and time. While the large single and multiple projectors are maintained by many of the projections portable planetariums are catered by the other systems.