spiral galaxy
noun Date: 1913 a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity — called also spiral nebula

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • spiral galaxy — n. a galaxy having the visible form of a spiral: also spiral nebula …   English World dictionary

  • 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

  • spiral galaxy — noun a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center • Syn: ↑spiral nebula • Hypernyms: ↑galaxy, ↑extragalactic nebula • Hyponyms: ↑Andromeda galaxy …   Useful english dictionary

  • spiral galaxy — spi′ral gal′axy n. astron. a galaxy having a spiral structure. Compare elliptical galaxy • Etymology: 1910–15 …   From formal English to slang

  • spiral galaxy — Astron. a galaxy having a spiral structure. [1910 15] * * * …   Universalium

  • spiral galaxy — noun A galaxy having a number of arms of younger stars that spiral out from the centre containing older ones …   Wiktionary

  • spiral galaxy — /spaɪrəl ˈgæləksi/ (say spuyruhl galuhksee) noun one of the extragalactic stellar systems which shows spiral structure. Also, spiral nebula …   Australian English dictionary

  • Barred spiral galaxy — A barred spiral galaxy is a spiral galaxy with a central bar shaped structure composed of stars. Bars are found in approximately half of all spiral galaxiescite book author=J. Binney, S. Tremaine year=1987 title=Galactic Dynamics… …   Wikipedia

  • Dwarf spiral galaxy — A dwarf spiral galaxy is the dwarf version of a spiral galaxy. Dwarf galaxies are characterized as having low luminosities, small diameters (less than 5 kpc), low surface brightnesses, and low hydrogen masses.[1] The galaxies may be considered a… …   Wikipedia

  • flocculent spiral galaxy — noun a spiral galaxy with discontinuous spiral arms Syn: flocculent spiral, flocculent galaxy, flocculent Ant: grand design spiral galaxy See Also: spiral galaxy, barred spiral galaxy, intermediate spiral galaxy, unbarred spiral galaxy,… …   Wiktionary

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