Editing Great Attractor (section)

== History ==
The Great Attractor was named by [[Alan Dressler]] in 1987,<ref>{{Cite journal |last=Dressler |first=Alan |date=1987 |title=The Large-Scale Streaming of Galaxies |url=https://www.jstor.org/stable/24979477 |journal=Scientific American |volume=257 |issue=3 |pages=46–55 |doi=10.1038/scientificamerican0987-46 |jstor=24979477 |bibcode=1987SciAm.257c..46D |issn=0036-8733}}</ref><ref name=StraussWillick>{{Cite journal |last1=Strauss |first1=Michael A. |last2=Willick |first2=Jeffrey A. |date=1995-10-01 |title=The density and peculiar velocity fields of nearby galaxies |url=https://dx.doi.org/10.1016/0370-1573%2895%2900013-7 |journal=Physics Reports |volume=261 |issue=5 |pages=271–431 |doi=10.1016/0370-1573(95)00013-7 |issn=0370-1573|arxiv=astro-ph/9502079 |bibcode=1995PhR...261..271S }}</ref> following decades of redshift surveys that built up a large dataset of redshift values. The redshift values and distance measurements independent of redshift measurements were then combined to create maps of peculiar velocity.<ref name=StraussWillick/>{{rp|274}}

Through a series of peculiar velocity tests, astrophysicists found that the Milky Way was moving in the direction of the [[Centaurus|constellation of Centaurus]] at about 600{{nbs}}km/s. {{cn|date=November 2023}} Then, the discovery of [[cosmic microwave background]] (CMB) dipoles was used to reflect the motion of the [[Local Group]] of galaxies towards the Great Attractor.<ref>{{Cite web |title=Cosmic Microwave Background Dipole {{!}} COSMOS |url=https://astronomy.swin.edu.au/cosmos/c/Cosmic+Microwave+Background+Dipole |access-date=2022-03-14 |website=astronomy.swin.edu.au}}</ref> The 1980s brought many discoveries about the Great Attractor, such as the fact that the Milky Way is not the only galaxy impacted. Approximately 400 [[elliptical galaxies]] are moving toward the Great Attractor beyond the Zone of Avoidance caused by the Milky Way galaxy light.

Intense efforts during the late 1990s, to work through the difficulties caused by the occlusion by the Milky Way, identified the [[Norma Cluster]] at the center of the Great Attractor region.<ref name=BehindMilkyWay>{{Cite book |last=Kraan-Korteweg |first=Renée C. |title=Reviews in Modern Astronomy |date=2005-07-22 |editor-last=Röser |editor-first=Siegfried |chapter=Cosmological Structures behind the Milky Way |chapter-url=https://onlinelibrary.wiley.com/doi/10.1002/3527608966.ch3 |language=en |publisher=Wiley |pages=48–75 |doi=10.1002/3527608966.ch3 |arxiv=astro-ph/0502217 |isbn=978-3-527-40608-1}}</ref>