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In astronomy, a galactic latitude or longitude, useful for describing the relative positions and motions of components of the Milky Way Galaxy. Galactic latitude is measured in degrees north or south of the plane of the Milky Way. Galactic longitude is measured in degrees east of the galactic centre in the constellation Sagittarius.
This entry comes from Encyclopædia Britannica Concise. For the full entry on galactic coordinate, visit Britannica.com.
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