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.

Science Fiction and Fantasy Encyclopedia. . 2011.

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