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Great Attractor

The Great Attractor (GA) is a gigantic mass in space which pulls our Milky Way galaxy, and many other galaxies towards it.[1]p60

The Great Attractor is known by its effect on the movement of galaxies across hundreds of millions of light years (mly). Its mass is equivalent to the mass of tens of thousands of Milky Ways.

All the galaxies in the GA are redshifted, in accordance with the expansion of the Universe. They are receding relative to us and to each other, but the variations in their redshift show the existence of the Attractor. The variations in their redshifts range from about +700 km/s to -700 km/s, depending on where they are in relation to the Great Attractor.

Panoramic view of the entire near-infrared sky — location of the Great Attractor is shown following the long blue arrow at bottom-right.
  1. ↑ Rees, Martin 1999. Just six numbers: the deep forces that shape the Universe. Weidenfeld & Nicolson, London.
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