- 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]
* * *Proposed concentration of mass, equivalent to tens of thousands of galaxies, that influences the movement of many galaxies, including the Milky Way Galaxy(see galaxy).In 1986 a group of astronomers noted that the Milky Way and neighbouring galaxies exhibit systematic deflections from the motion predicted by Edwin P. Hubble's theory of the expanding universe. One possible explanation is a large collection of galaxies exerting a gravitational pull on the clusters of galaxies around it; its centre would lie in the direction of the constellations Hydra or Centaurus in the southern sky, about 200 million light-years from Earth.
* * *proposed concentration of mass that influences the movement of many galaxies, including the Milky Way (Milky Way Galaxy). In 1986 a group of astronomers observing the motions of the Milky Way and neighbouring galaxies noted that the galaxies were moving toward the Hydra-Centaurus superclusters in the southern sky with velocities significantly different from those predicted by the expansion of the universe in accordance with the Hubble law (see Hubble's constant). One possible explanation for this perturbation in the Hubble flow is the existence of the so-called Great Attractor—a region or structure of huge mass (equivalent to tens of thousands of galaxies) exerting a gravitational pull on the surrounding galaxies. It is estimated that the Great Attractor would have a diameter of about 300 million light-years and that its centre would lie about 147 million light-years away from Earth.
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Great Attractor — NOTOC The Great Attractor is a gravity anomaly in intergalactic space within the range of the Centaurus Supercluster that reveals the existence of a localised concentration of mass equivalent to tens of thousands of Milky Ways, observable by its… … Wikipedia
Great Attractor — Great′ Attrac′tor n. astron. 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 • Etymology:… … From formal English to slang
Great attractor — Der Große Attraktor ist ein sogenanntes Filament und eine der massereichsten bekannten Strukturen im Universum. Er hat eine Masse in der Größenordnung von 10 Billiarden Sonnenmassen (1016 M☉) und ist etwa 150 bis 250 Millionen Lichtjahre von der… … Deutsch Wikipedia
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 • Hypernyms: ↑galaxy, ↑extragalactic nebula … Useful english dictionary
great — greatness, n. /grayt/, adj., greater, greatest, adv., n., pl. greats, (esp. collectively) great, interj. adj. 1. unusually or comparatively large in size or dimensions: A great fire destroyed nearly half the city … Universalium
Dark flow — Physical cosmology Universe · Big Bang … Wikipedia
Shapley Supercluster — The Shapley Supercluster (Shapley Concentration) is the largest concentration of galaxies in our nearby Universe that forms a gravitationally interacting unit, thereby pulling itself together instead of expanding with the Universe. It appears as… … Wikipedia
Galaxy filament — [ dark matter distribution in a slice cut through a simulation of a flat universe with cosmological constant. The distribution reveals fine, filamentary structures. The slice has a side length of 520 million light years, and a thickness of 100… … Wikipedia
Gary A. Wegner — Gary Alan Wegner (born Seattle, Washington on December 26, 1944) is an American astronomer, the endowed Leed 49 Professor of Physics and Astronomy at Dartmouth College, and recipient of the Alexander Von Humboldt Prize. Wegner was also a member… … Wikipedia
Large-scale structure of the cosmos — In physical cosmology, the term large scale structure refers to the characterization of observable distributions of matter and light on the largest scales (typically on the order of billions of light years). Sky surveys and mappings of the… … Wikipedia