English > extragalactic nebula: 1 sense > noun 1, group| Meaning | (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust. |
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| Example | "'extragalactic nebula' is a former name for 'galaxy'" |
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| Synonym | galaxy |
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| Category | astronomy, uranology | The branch of physics that studies celestial bodies and the universe as a whole |
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| Instances | Magellanic Cloud | Either of two small galaxies orbiting the Milky Way |
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| Member of | universe, existence, creation, world, cosmos, macrocosm | Everything that exists anywhere |
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| Members | star | (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior |
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| Narrower | Great Attractor | A massive grouping of galaxies in the direction of Centaurus and Hydra whose gravitational attraction is believed to cause deviations in the paths of other galaxies |
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| Milky Way, Milky Way Galaxy, Milky Way System | The galaxy containing the solar system |
| spiral galaxy, spiral nebula | A galaxy having a spiral structure |
| Broader | collection, aggregation, accumulation, assemblage | Several things grouped together or considered as a whole |
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| Substances | cosmic dust | Clouds of particles or gases occurring throughout interstellar space |
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| Spanish | galaxia, nebulosa |
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| Catalan | galàxia, nebulosa |
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