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shutter cycle diagram

Movie projector — This article is concerned with technical aspects of moving film projection. For non film movie projection, see digital cinema. For historical aspects, see the article history of cinema. 35 mm movie projector in operation … Wikipedia
Door — For other uses, see Door (disambiguation). A door is a movable structure used to open and close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates inside of a space. When open, they admit ventilation… … Wikipedia
Argus As 014 — As 014 Argus As 014 of the V 1 flying bomb on display at the Royal Air Force Museum London Type … Wikipedia
Circumpolar star — The northern circumpolar stars revolving around the north celestial pole. Note that Polaris, the bright star near the center, is almost stationary. Polaris is circumpolar and can be seen at all times of the year. (The graphic shows how the… … Wikipedia
James Webb Space Telescope — General information Organization NASA[1], with significant contributions from ESA and CSA … Wikipedia