Definition of extragalactic nebula Extragalactic nebula
ex•tra•ga•lac•tic neb•u•la
We found 1 definitions of extragalactic nebula from 1 different sources.
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What does extragalactic nebula mean?
WordNet
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| extragalactic nebula - (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'" | ||
| galaxy | ||
| aggregation, accumulation, assemblage, collection the act of accumulating | ||
| macrocosm, cosmos, existence, universe, creation, world any of various mostly Mexican herbs of the genus Cosmos having radiate heads of variously colored flowers and pinnate leaves; popular fall-blooming annuals | ||
| astronomy, uranology the branch of physics that studies celestial bodies and the universe as a whole | ||
| spiral galaxy, spiral nebula a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center | ||
| 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 | ||
| milky way, milky way galaxy, milky way system the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky | ||
| star (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior | ||
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