extragalactic nebula
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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
Extragalactic distance scale — The extragalactic distance scale is a series of techniques used today by astronomers to determine the distance of cosmological bodies (beyond our own galaxy) not easily obtained with traditional methods. Some procedures utilize properties of… … Wikipedia
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
Planetary nebula luminosity function — (PNLF) is a secondary distance indicator used in astronomy. It makes use of the [O III| [O III] λ5007 forbidden line found in all planetary nebula which are members of the old stellar populations (Population… … Wikipedia
Planetary nebula — A planetary nebula is an emission nebula consisting of a glowing shell of gas and plasma formed by certain types of stars when they die. The name originated in the 18th century because of their similarity in appearance to giant planets when… … Wikipedia
North America Nebula — This image layout reveals how the appearance of the North America nebula can change dramatically using different combinations of visible and infrared observations. Observation data: J2000.0 epoc … Wikipedia
Bubble Nebula (NGC 6822) — Diffuse nebula name = Bubble Nebula in Barnard s Galaxy type = Emission epoch = J2000 ra = RA|19|44|31.8harvnb|NED|2007] dec = DEC| 14|41|57 dist ly = 1.63 ± 0.03 Mly (500 ± 10 kpc)harvnb|Karachentsev|Karachentseva|Hutchmeier|Makarov|2004]… … Wikipedia
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
