Great Attractor

n (Astronomy) astronomy a large mass, possibly a gigantic cluster of galaxies, postulated to explain the fact that many galaxies appear to be moving towards a particular point in the sky

Great′ Attrac′tor

n. a vast concentration of matter whose gravitational pull alters the direction and speed of the Milky Way and other galaxies as they spread apart in the expanding universe posited by the big bang theory. [1985–90]

Thesaurus

Noun

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 galaxiesextragalactic nebula, galaxy - (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'"

Translations

grande attrattore

Great Attractor

A large concentration of mass that is detectable only by its powerful gravitational pull on our Galaxy and its Local Supercluster. Redshift surveys in the late 1980s revealed that the peculiar motion of the Local Group relative to the microwave background was not due solely to the gravitational effect of the Virgo cluster, but also to large-scale structure just beyond the Hydra–Centaurus supercluster in the southern sky.

Great Attractor

[¦grāt ə′trak·tər] (astronomy) A great supercluster of galaxies and dark matter, approximately 150 × 10⁶ light-years distant, whose existence has been hypothesized to account for the peculiar motions of galaxies, including the Milky Way Galaxy.

Great Attractor

noun

Words related to Great Attractor

noun 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

Related Words

extragalactic nebula
galaxy

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