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A Pale Yellow Dot...

The Milky Way, our galaxy, is a small part of a much larger structure called the Laniakea Supercluster. Laniakea is a relatively new concept, defined in 2014 in a paper published by astronomers from the University of Lyon. The structure of the supercluster is determined by the relative peculiar velocities of galaxies.
Laniakea subsumes the prior defined local supercluster, the Virgo Supercluster, which is now a section of the branch we are on. In the image to the right, the red dot represents the location of our galaxy. If you travel up the branch we are on, that first bright section you hit is the Virgo Supercluster. Laniakea consists of 100,000 galaxies over half a billion light-years. It contains four major subsections, the Virgo Supercluster, the Hydra-Centaurus Supercluster, the Pavo-Indus Supercluster, and the Southern Supercluster.
The Great Attractor, a gravitational anomaly located near the Hydra-Centaurus Supercluster pulls all galaxies and galaxy clusters in our area toward it. It now is known to be the center of mass of the Laniakea Supercluster.
If you get a chance, please watch this great video created by Nature on the Laniakea Supercluster:
Nature Video on Laniakea
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