Galaxy/Related Articles

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A list of Citizendium articles, and planned articles, about Galaxy.
See also changes related to Galaxy, or pages that link to Galaxy or to this page or whose text contains "Galaxy".

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  • Andromeda Galaxy [r]: Nearest large spiral galaxy to the Milky Way, also known as Messier 31 [e]
  • Astronomy [r]: The study of objects and processes in the observable universe, e.g. stars, planets, comets or asteroids. [e]
  • Black hole [r]: Area of space-time with a gravitational field so intense that its escape velocity is equal to or exceeds the speed of light. [e]
  • Cosmic inflation [r]: Theorized exponential expansion of the universe at the end of the grand unification epoch, 10−36 seconds after the Big Bang, driven by a negative-pressure vacuum energy density. [e]
  • Cosmology [r]: A branch of astronomy and of metaphysics committed to the study of the universe as a whole, of the contents, structure, and evolution of the universe from the beginning of time to the future. [e]
  • Earth [r]: The third planet from the Sun in our solar system; the only place in the universe known by humanity to harbor life. [e]
  • GALEX [r]: An orbiting ultraviolet space telescope that was launched on April 28, 2003. [e]
  • Galaxy rotation curve [r]: Graph of a galaxies curve, represented by a plot of the orbital velocity of the stars or gas in the galaxy on the y-axis against the distance from the center of the galaxy on the x-axis. [e]
  • Globular cluster [r]: Spherical, globular collection of stars that orbits a galactic core as a satellite, and is generally smaller in size than a galaxy. [e]
  • Gravitational lens [r]: A lens formed when light from a very distant, bright source (such as a quasar) is 'bent' around a massive object (such as a cluster of galaxies) between the source object and the observer. [e]
  • Hayford Peirce [r]: (1942), an American writer of science fiction, mysteries, and spy thrillers. Most of his stories are light-hearted and satiric in tone, with elements of black humor and occasional surprising grimness. [e]
  • International Ultraviolet Explorer [r]: An astronomical satellite designed primarily to observe ultraviolet spectra. [e]
  • Jacobus Kapteyn [r]: same as Jacobus Kapteijn; Dutch astronomer (1851 - 1922). [e]
  • Messier object [r]: Systematic list of nebulae, galaxies, and star clusters, first compiled and published in 1771 by Charles Messier, it originally contained 45 objects, later superseded by the New General Catalogue (NGC). [e]
  • Milky Way [r]: The Milky Way galaxy which contains our solar system. [e]
  • NGC 1068 [r]: Also known as M 77, a galaxy located in the constellation Cetus. [e]
  • NGC 205 [r]: A small, elliptical satellite galaxy of the Andromeda Galaxy. [e]
  • NGC 221 [r]: NGC 221 or Messier 32, is an elliptical satellite galaxy of the Andromeda Galaxy [e]
  • NGC 3031 [r]: Galaxy in the constellation Ursa Major [e]
  • NGC 3034 [r]: A starburst galaxy about 12 million light-years away in the constellation Ursa Major, which is five times as bright as the whole Milky Way. [e]
  • NGC 3351 [r]: A barred spiral galaxy about 33 million light-years away in the constellation Leo. [e]
  • NGC 3368 [r]: An intermediate spiral galaxy about 31 million light-years away in the constellation Leo. [e]
  • NGC 3379 [r]: A galaxy, also known as M 105, in the constellation Leo. [e]
  • NGC 3556 [r]: An edge-on spiral galaxy in the constellation Ursa Major. [e]
  • NGC 3623 [r]: An intermediate spiral galaxy about 22 million light-years away in the constellation Leo. [e]
  • NGC 3627 [r]: An intermediate spiral galaxy about 36 million light-years away in the constellation Leo. [e]
  • NGC 3992 [r]: Galaxy in the constellation Ursa Maior. [e]
  • NGC 4192 [r]: An intermediate spiral galaxy about 60 million light-years away in the constellation Coma Berenices. [e]
  • NGC 4254 [r]: An unbarred spiral galaxy approximately 60 million light-years away in the constellation Coma Berenices. [e]
  • NGC 4258 [r]: A galaxy in the constellation Canes Venatici. [e]
  • NGC 4303 [r]: A spiral galaxy in the Virgo Cluster. [e]
  • NGC 4321 [r]: A spiral galaxy about 52.5 million light-years away in the constellation Coma Berenices. [e]
  • NGC 4374 [r]: A lenticular galaxy in the constellation Virgo, situated in the heavily populated inner core of the Virgo Cluster of galaxies. [e]
  • NGC 4382 [r]: A lenticular galaxy (type S0) in the Coma Berenices constellation, 60 million light years away, and estimated to be 125,000 light years across. [e]
  • NGC 4406 [r]: A lenticular galaxy in the constellation Virgo. [e]
  • NGC 4472 [r]: An elliptical, lenticular galaxy about 49 million light-years away in the constellation Virgo. [e]
  • NGC 4486 [r]: A giant elliptical galaxy, which is the largest and brightest galaxy within the northern Virgo Cluster, located about 55 million light years away. [e]
  • NGC 4501 [r]: A spiral galaxy about 47 million light-years away in the constellation Coma Berenices. [e]
  • NGC 4548 [r]: A barred spiral galaxy about 63 million light-years away in the constellation Coma Berenices. [e]
  • NGC 4552 [r]: An elliptical galaxy in the constellation Virgo, and a member of the Virgo Cluster of galaxies. [e]
  • NGC 4569 [r]: A spiral galaxy about 60 million light-years away in the constellation Virgo. [e]
  • NGC 4579 [r]: A galaxy located in the constellation Virgo. [e]
  • NGC 4594 [r]: An unbarred spiral galaxy in the constellation Virgo, which has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its inclined disk. [e]
  • NGC 4621 [r]: An elliptical galaxy in the constellation Virgo. [e]
  • NGC 4649 [r]: A galaxy located in the constellation Virgo. [e]
  • NGC 4736 [r]: A spiral galaxy in the constellation Canes Venatici. [e]
  • NGC 4826 [r]: A galaxy located in the constellation Coma Berenices. [e]
  • NGC 5055 [r]: An unbarred spiral galaxy in the Canes Venatici constellation, consisting of a central disc surrounded by many short spiral arm segments. [e]
  • NGC 5236 [r]: An intermediate spiral galaxy approximately 15 million light-years away in the constellation Hydra. [e]
  • NGC 5457 [r]: A face-on spiral galaxy about 27 million light-years away in the constellation Ursa Major. [e]
  • NGC 598 [r]: A spiral galaxy approximately 3 million light-years away in the constellation Triangulum. [e]
  • NGC 628 [r]: A face-on spiral galaxy in the constellation Pisces, containing two clearly-defined spiral arms and used as an archetypal example of a Grand Design Spiral Galaxy. [e]
  • Red dwarf (star) [r]: Small and relatively cool star, of low luminosity, being in the main sequence either late K or M spectral type. [e]
  • Solar system [r]: The sun and the planets orbiting it. [e]
  • Triangulum [r]: Constellation in the northern sky near Aries and Andromeda, its name is Latin for 'triangle'. [e]
  • Whirlpool Galaxy [r]: Galaxy located in the constellation Canes Venatici. [e]