The project is placed in the visitor’s gallery. This projector was replaced in the year 2003 with new digital projector. The third movement takes care of the precission of the equinoxes. One could show the sky as seen from the North Pole to the South Pole in a matter of minutes. The entire projector could be rotated around three axes to simulate the effects of the Earth’s daily and precessional motion and the effects of changes in the observer’s latitude. The projector did its job without giving any indication that what is seen is simulation of the sky and the stars. The annual parallax shifts of the bright star Sirius could also be demonstrated. Other projectors displayed the milky way, variable stars, navigation and coordinate circles, constellation outlines and twilight, special effects like solar and lunar eclipses, aurora, comets, meteor showers, artificial satellites, solar system as seen from outer space and Jupiter with its moons revolving around the planet. These projectors rotate independently to provide for the apparent motion of these heavenly bodies as seen from the Earth. There were 20 special projectors to project the images of 20 stars, which were brighter than the first magnitude.Īdditional projectors were mounted in the cage connecting the two globes, for five bright planets – Mercury, Venus, Mars, Jupiter and Saturn, the Sun, Moon and Phases of the Moon. The Universal Planetarium Projector could project about 8,900 stars of up to 6.5 magnitudes, as also 18 star clusters and nebulae visible to the naked eye. The size of the holes corresponded to the apparent brightness of the stars. The star images were formed by holes of 52 different sizes, of diameters ranging from 0.023 to 0.452 mm, made on a copper foil of 0.015 mm thickness. The projection sides were made from actual photographs of stars, taken through telescopes in such a way that the images do the overlap. The upper globe contained star plates for the Northern Hemisphere and the lower globe for the Southern Hemisphere. Sixteen projectors were mounted on each globe with condenser and projection lenses to depict the fixed stars. The Zeiss projector whirs while it reproduces hundreds of stars, exactly as they would look on a clear sky.Īt either end of the projector were 750 – mm diameter spherical globe with a 1500-watt incandescent projection lamp. The projector could showed all celestial bodies moving at their relative speeds, compressing the daily movements into a few minutes or seconds. It could recreate several celestial phenomena like the motion of the Sun, Moon and planets. Introduction & Instrument Setup Additional symbols appearing on the HFA II- Power Off Power On Projector Lamp Brightness VGA Video Port Air Intake Filter Keyboard/Mouse Serial RS-232 Port Communication Port Network Port Printer Patient Response Button USB Port DO NOT USE Figure 1. ![]() Shaped like a dumb-bell, it was a versatile instrument that faithfully reproduced the night sky as seen from any place on Earth at any time – past, present or future. ![]() In the middle of the sky theatre stood this giant Projector – “The Universal Planetarium Projector” made by VEB Carl Zeiss Jena of German Democratic Republic.
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