Astronomers doing redshift surveys of galaxies and large-scale structure think our local neighborhood is part of the Shapley Concentration.
A data visualization of the motions of galaxies in structures called basins of attraction. The Milky Way is the red dot. Courtesy of the University of Hawai'i.
A slice of the Laniakea Supercluster, a local basin of attraction. This structure contains many galaxies and clusters, including our own Milky Way Galaxy. Credit: SDvision interactive visualization software by DP at CEA/Saclay, France. The Shapley Concentration was first observed by astronomer Harlow Shapley in the 1930s as a “cloud” in the constellation Centaurus. This supercluster appears along the direction of motion of the Local Group of galaxies . Because of that, scientists speculated that it could be influencing our galaxy’s peculiar motion. Interestingly, the Virgo Supercluster appears to be moving toward the Shapley Concentration.
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