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Milky Way found to be too big for its 'cosmological wall' - Phys.org

Milky Way found to be too big for its 'cosmological wall' - Phys.org

Milky Way found to be too big for its 'cosmological wall' - Phys.org
Jan 23, 2023 53 secs

The Milky Way is found to be surprisingly massive in comparison to its cosmological wall, a rare cosmic occurrence.

According to the team, it may be necessary to take into account the special environment around the Milky Way when running simulations, to avoid a so-called "Copernican bias" in making scientific inference from the galaxies around us.

This bias, describing the successive removal of our special status in the nearly 500 years since Copernicus demoted the Earth from being at the center of the cosmos, would come from assuming that we reside in a completely average place in the universe.

If you could see the nearest dozen or so large galaxies easily in the sky, you would see that they all nearly lie on a ring, embedded in the Local Sheet.

More information: M A Aragon-Calvo et al, The unusual Milky Way-local sheet system: implications for spin strength and alignment, Monthly Notices of the Royal Astronomical Society: Letters(2022).

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