Editing Galactic coordinate system (section)

=== Galactic longitude ===
[[File:Galactic coordinates.JPG|thumb| The galactic coordinates use the [[Sun]] as the origin. Galactic longitude ({{math|''l''}}) is measured with primary direction from the Sun to the center of the galaxy in the galactic plane, while the galactic latitude ({{math|''b''}}) measures the [[angle]] of the object above the [[galactic plane]].]]

Longitude (symbol {{math|''l''}}) measures the [[angle|angular distance]] of an object eastward along the galactic equator from the Galactic Center. Analogous to terrestrial [[longitude]], galactic longitude is usually measured in degrees (°).