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Literally, guidance by the stars. In sf Terminology this is the space equivalent of navigation, and the astrogator is conventionally one of the most important officers on a Spaceship. After a jump through Hyperspace, perhaps, it is necessary – although less frequently now than in the Golden Age of SF – for the astrogator to identify several stars, usually through spectroscopy, to confirm the craft's position by triangulation. [PN]

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