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A planetarium projector, also known as a star projector, is a device used to project images of celestial objects onto the dome in a planetarium. Modern planetarium projectors were first designed and built by the Carl Zeiss Jena company in Germany between 1923 and 1925, and have since grown more complex.
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The Best Budget Projectors We Recommend. Best Overall: DBPower Native 1080p Projector. Best Budget: Vizony DP04 Mini Projector. Best for Presentations: ViewSonic Home and Office Projector. Best ...
Many of us think about buying a projector without acting on it. It would be so nice, we imagine, to have a nifty, relatively small device with which to watch any movie or show at any size we wish ...
The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade, usually positioned 1000 ft (300 m) away and wherever possible set at the same level. The projector is normally set at 90°, although 71° 31' may be used, in relation to ...
Smaller planetarium projectors include a set of fixed stars, Sun, Moon, and planets, and various nebulae. Larger projectors also include comets and a far greater selection of stars. Additional projectors can be added to show twilight around the outside of the screen (complete with city or country scenes) as well as the Milky Way.
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