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Galactic halo

(astronomy) a spheroidal aggregation of globular clusters, individual stars, dust, and gas that surrounds the Galaxy
galactic halo
A large, spherical region of relatively dust-free space surrounding a spiral galaxy such as the Milky Way. The inner regions of the galactic halo contain globular clusters of very old stars, while the outer regions are apparently occupied by large amounts of dark matter. See also MACHO.


Read Also:

  • Galactic-latitude

    noun, Astronomy. 1. the angular distance from the galactic equator of a point on the celestial sphere.

  • 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.

  • Galactic-nebula

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

  • Galactic-noise

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

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