galactic longitude

noun Astronomy.

the angular distance in degrees measured eastward in the galactic plane from a radius drawn from the earth as center to the constellation Sagittarius.

Origin of galactic longitude

First recorded in 1910–15

Words nearby galactic longitude

galactic coordinate, galactic coordinate system, galactic equator, galactic halo, galactic latitude, galactic longitude, galactic nebula, galactic noise, galactic nucleus, galactic plane, galactic pole