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Galactic coordinate system

The galactic coordinate system is a celestial coordinate system that uses the Milky Way as its fundamental plane[?]. The latitudinal angle is called the galactic latitude[?], and the longitudinal angle is called the galactic longitude[?]. This coordinate system is useful for studying the galaxy itself. For example, you might want to know how the density of stars changes as a function of galactic latitude, to how much the disk of the Milky Way is flattened.

This article originates from Jason Harris' Astroinfo which comes along with KStars, a Desktop Planetarium for Linux/KDE. See http://edu.kde.org/kstars/index.phtml

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