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noun, Astronomy.
the angular distance from the galactic equator of a point on the celestial sphere.


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  • Galactic-longitude

    noun, Astronomy. 1. the angular distance in degrees measured eastward in the galactic plane from a radius drawn from the earth as center to the constellation Sagittarius.

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    noun, Astronomy. 1. a nebula in the Milky Way.

  • Galactic-noise

    noun 1. unidentified radio-frequency radiation originating from beyond the solar system.

  • Galactic nucleus

    galactic nucleus The center of a galaxy, usually small, very bright, and containing a high density of stars and other objects. ◇ An active galactic nucleus is a nucleus that emits more radiation than can be explained in terms of stars alone. Blazars and quasars are thought to be active galactic nuclei; the nuclei of […]

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