extragalactic nebula

extragalactic nebula
(formerly) galaxy (def. 1a).

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Universalium. 2010.

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  • extragalactic nebula — noun (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust extragalactic nebula is a former name for galaxy • Syn: ↑galaxy • Derivationally related forms: ↑galactic (for: ↑gal …   Useful english dictionary

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  • nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …   Universalium

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

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  • Messier 87 — Virgo A The Messier 87 galaxy. Observation data Epoch J2000 Constellation Virgo Right ascension …   Wikipedia

  • Messier 87 — Datenbanklinks zu Messier 87 Galaxie Messier 87 …   Deutsch Wikipedia

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