stellar association

stellar association

noun Astronomy.
a sparsely populated group of between 10 and 1000 young stars of similar spectral type and common origin that are moving too fast to form a permanent, gravitationally bound system.
Also called association of stars, association.
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Encyclopedia Britannica
Encyclopedia

stellar association

a very large, loose grouping of stars that are of similar spectral type and relatively recent origin. Stellar associations are thought to be the birthplaces of most stars

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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