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pertaining to galaxies

Does “natural selection” apply extra-galactically?

immensely; to a vast degree

It was a galactically stupid mistake.
Word Origin



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  • Galactic-cluster

    noun, Astronomy. 1. . noun, Astronomy. 1. a comparatively young, irregularly shaped group of stars, often numbering up to several hundred, and held together by mutual gravitation; usually found along the central plane of the Milky Way and other galaxies. noun a loose grouping of stars Usage Note astronomy galactic cluster (gə-lāk’tĭk) See open cluster. […]

  • Galactic coordinate system

    galactic coordinate system The coordinate system in which a celestial object’s position on the celestial sphere is described in relation to the structure of the Milky Way galaxy. ◇ An object’s galactic longitude is measured along the galactic equator, a great circle on the celestial sphere that follows the band of the Milky Way. The […]

  • Galactic-equator

    noun, Astronomy. 1. the great circle on the celestial sphere that is equidistant from the galactic poles, being inclined approximately 62° to the celestial equator and lying about one degree north of the center line of the Milky Way. noun 1. the great circle on the celestial sphere containing the galactic plane

  • Galactic halo

    noun 1. (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 […]

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