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CfA2 Great Wall

Immense galaxy filament

The Great Wall (also called Coma Wall), sometimes specifically referred to as the CfA2 Great Wall, is an immense galaxy filament. It is one of the largest known superstructures in the observable universe.

This structure was discovered c. 1989 by a team of American astronomers led by Margaret J. Geller and John Huchra while analyzing data gathered by the second CfA Redshift Survey of the Center for Astrophysics Harvard & Smithsonian (CfA).

Characteristics

According to Marcus Chown, "The filament is about 300 million lightyears wide, 15 million lightyears thick and it snakes for at least 500 million lightyears across the Universe."

Components

It was discovered in 1989 by Margaret Geller and John Huchra based on redshift survey data from the CfA Redshift Survey.{{Cite journal | access-date = 2011-05-03 | url-access = subscription

It is not known how much further the wall extends due to the light absorption in the plane of the Milky Way galaxy where Earth is located. The gas and dust from the Milky Way (known as the Zone of Avoidance) obscure the view of astronomers and have so far made it impossible to determine if the wall ends or continues on further than they can currently observe.

In the standard model of the evolution of the universe, such structures as the Great Wall form along and follow web-like strings of dark matter.{{Cite book |author1-link=Michael Riordan (physicist) | url-access = registration

References

(2024). "CfA2 Great Wall of galaxies". BBC.

Info: Wikipedia Source

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astronomical-objects-discovered-in-1989 great-wall-filament galaxy-filaments large-scale-structure-of-the-cosmos

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