NGC 221/Related Articles

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A list of Citizendium articles, and planned articles, about NGC 221.
See also changes related to NGC 221, or pages that link to NGC 221 or to this page or whose text contains "NGC 221".

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  • Andromeda (constellation) [r]: Constellation in the northern sky, which is surrounded by Auriga, Perseus, Aries, Cetus, Eridanus, Orion and Gemini. [e]
  • Andromeda Galaxy [r]: Nearest large spiral galaxy to the Milky Way, also known as Messier 31 [e]
  • Declination [r]: Angular distance to a point on a celestial object, measured north or south from the celestial equator. [e]
  • Galaxy [r]: Gravitationally bound system of stars typically contain ten million to one trillion stars. [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]
  • 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and star clusters, first compiled and published in 1771 by Charles Messier, it originally contained 45 objects, later superseded by the New General Catalogue (NGC).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]
  • NGC 205 [r]: A small, elliptical satellite galaxy of the Andromeda Galaxy. [e]