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Due to the accelerating expansion of the universe, the individual clusters of gravitationally bound galaxies that make up galaxy filaments are moving away from each other at an accelerated rate; in the far future they will dissolve. [2] Galaxy filaments form the cosmic web and define the overall structure of the observable universe. [3] [4] [5]
Some structures have no defined limits, or endpoints. All structures are believed to be part of the cosmic web, which is a conclusive idea. [clarification needed] Most structures are overlapped by nearby galaxies, creating a problem of how to carefully define the structure's limit.
The term "Great" has been added to distinguish it as an even larger type compared to standard galaxy walls. The CfA2 Great Wall has the maximum dimensions of either 500 million or 750 million light years depending on the figure and the reference used.
A James Webb telescope image has unveiled a 'knot' of galaxies from 11.5 ... understanding of how the present-day web of galaxies came to be, not to mention how quasars might stifle star formation ...
An early direct evidence for this cosmic web of gas was the 2019 detection, by astronomers from the RIKEN Cluster for Pioneering Research in Japan and Durham University in the U.K., of light from the brightest part of this web, surrounding and illuminated by a cluster of forming galaxies, acting as cosmic flashlights for intercluster medium ...
The Sloan Great Wall is between 1.8–2.7 times longer than the CfA2 Great Wall of galaxies (discovered by Margaret Geller and John Huchra of Harvard University in 1989). [2] It also contains several galactic superclusters, the largest and richest of which is named SCl 126. This is located in the highest density region of the structure. [3] [4]
This “cosmic web” started out tenuous and became more distinct over time as gravity drew matter together.Astronomers for the ASPIRE program using the NASA/ESA/CSA James Webb Space Telescope have discovered a thread-like arrangement of 10 galaxies that existed just 830 million years after the Big Bang.
The Hercules–Corona Borealis Great Wall (HCB) [1] [5] or simply the Great Wall [6] is a galaxy filament that is the largest known structure in the observable universe, measuring approximately 10 billion light-years in length (the observable universe is about 93 billion light-years in diameter).