ring nebulae

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• Ring Nebula — For the Ring Nebula in Barnard s Galaxy, see Ring Nebula (NGC 6822). The Ring Nebula M57, The Ring Nebula. Credit: NASA/STScI/AURA …   Wikipedia

• Ring Nebula — Astron. a planetary nebula in the constellation Lyra that has a ringlike appearance surrounding its central star. * * * ▪ astronomy  (catalog numbers NGC 6720 and M 57), bright nebula in the constellation Lyra, several thousand light years from… …   Universalium

• Features of the Marvel Universe — The comic book stories published by Marvel Comics since the 1940 s have featured several noteworthy concepts besides its fictional characters, such as unique places and artifacts. The following lists detail many of them.PlacesCertain places, some …   Wikipedia

• Nebula — Nebulae redirects here. For the supercomputer in China, see Nebulae (computer). For other uses, see Nebula (disambiguation). The Pillars of Creation from the Eagle Nebula …   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

• Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …   Wikipedia

• Milky Way — This article is about the galaxy. For other uses, see Milky Way (disambiguation). Milky Way galaxy Image of the Milky Way s Galactic Center in the night sky above Paranal Observatory Observation data …   Wikipedia

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Sombrero Galaxy — For other uses, see M104 (disambiguation). Sombrero Galaxy[1][2] …   Wikipedia

• Aromatic hydrocarbon — Arene redirects here. For other uses, see Arene (disambiguation). An aromatic hydrocarbon or arene[1] (or sometimes aryl hydrocarbon)[2] is a hydrocarbon with alternating double and single bonds between carbon atoms. The term aromatic was… …   Wikipedia

• Andromeda Galaxy — The Andromeda Galax …   Wikipedia