galactic bulge

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• Bulge (astronomy) — Galactic center redirects here. For the center of the Milky Way galaxy, see Galactic Center. In astronomy, a bulge is a tightly packed group of stars within a larger formation. The term almost exclusively refers to the central group of stars… …   Wikipedia

• Galactic corona — The terms galactic corona and gaseous corona have been used in the first decade of the twenty first century to describe a hot, ionised, gaseous component in the Galactic halo of the Milky Way. A similar body of very hot and tenuous gas in the… …   Wikipedia

• Galactic halo — The term galactic halo is used to denote an extended, roughly spherical component of a galaxy, which extends beyond the main, visible component. It can refer to any of several distinct components which share these properties: * the galactic… …   Wikipedia

• Galactic astronomy — is the study of our own Milky Way galaxy and all its contents. This is in contrast to extragalactic astronomy, which is the study of everything outside our galaxy, including all other galaxies.Galactic astronomy is that branch of astronomy which… …   Wikipedia

• Galactic Center (disambiguation) — Galactic Center may refer to* Galactic Center, the rotational center of the Milky Way galaxy * the series of books, Galactic Center Saga. * Bulge (astronomy), the center of galaxies in general …   Wikipedia

• Galactic coordinate system — Artist s depiction of the Milky Way galaxy, showing the galactic longitude relative to the sun. The galactic coordinate system (GCS) is a celestial coordinate system which is centered on the Sun and is aligned with the apparent center of the… …   Wikipedia

• Active galactic nucleus — An active galactic nucleus (AGN) is a compact region at the centre of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum (in the radio, infrared, optical, ultra violet, X ray and/or gamma ray… …   Wikipedia

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …   Wikipedia

• Gravitational microlensing — Gravitational Lensing Formalism Strong lensing …   Wikipedia

• Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …   Wikipedia