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Some projections treat the Earth only as a sphere, others as either ellipsoid or sphere. The USGS has also conceived and designed several new projections, including the Space Oblique Mercator, the first map projection designed to permit mapping of the Earth continuously from a satellite with low distortion.
A good example of a "typical" planetarium projector of the 1960s was the Universal Projection Planetarium type 23/6, made by VEB Carl Zeiss Jena in what was then East Germany. [1] This model of Zeiss projector was a 13-foot (4.0 m)-long dumbbell-shaped object, with 29-inch (740 mm)-diameter spheres attached at each end representing the night ...
Digistar is the first computer graphics-based planetarium projection and content system.It was designed by Evans & Sutherland and released in 1983. The technology originally focused on accurate and high quality display of stars, including for the first time showing stars from points of view other than Earth's surface, travelling through the stars, and accurately showing celestial bodies from ...
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Planetarium software is application software that allows a user to simulate the celestial sphere at any time of day, especially at night, on a computer. Such applications can be as rudimentary as displaying a star chart or sky map for a specific time and location, or as complex as rendering photorealistic views of the sky .
Beginning with Mark VII, Zeiss projectors adopted a new, egg-shaped design. The Mark IX Universarium is currently the most advanced model. This example was installed in 2006 at The Griffith Observatory in Los Angeles. Closeup of a lens bearing sphere of the Zeiss Mark IV planetarium projector on display at the Nehru Planetarium in Mumbai, India.
The Projection Planetarium was a training device housed in the Flight Research Laboratory hangar at NASA's Langley Research Center in Hampton, Virginia. It consisted of a custom designed star projector surrounded by a 40 feet (12 m) diameter sphere constructed from a surplus 53 feet (16 m) radome. [ 1 ]
On May 9, 2006, Evans & Sutherland acquired Spitz Inc, a rival vendor in the planetarium market, giving the combined business the largest base of installed planetaria worldwide and adding in-house projection-dome manufacturing capability to E&S' offering.