Largest structures in the universe
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Largest Structures in the Universe: Superclusters, Walls, and Beyond
Superclusters and Cosmic Web Structures
Superclusters are the largest known conglomerates of galaxies, spanning hundreds of millions of light-years and containing thousands of galaxies. These structures, such as the recently discovered Quipu superstructure, can extend over 400 megaparsecs (Mpc) and contain a significant fraction of the universe’s galaxy clusters, galaxies, and matter, occupying about 13% of the cosmic volume 14. Superclusters are key components of the cosmic web, the vast network of filaments, walls, and voids that make up the large-scale structure of the universe 35.
The Sloan Great Wall and Other Gigantic Structures
The Sloan Great Wall (SGW) is one of the most prominent and massive structures observed, stretching over 400 Mpc and challenging our understanding of cosmic homogeneity 26. However, simulations and statistical analyses show that such structures are consistent with the standard cosmological model (ΛCDM), which predicts the existence of even larger structures in deeper surveys 26. The Shapley Supercluster is another massive concentration, but its existence is not considered highly unusual within current cosmological frameworks .
Gamma-Ray Burst Structures: Even Larger Scales
Recent studies using gamma-ray bursts (GRBs) as tracers have suggested the existence of structures far larger than previously known. One such structure, identified by the clustering of GRBs, is estimated to be 2000–3000 Mpc in size—over six times larger than the Sloan Great Wall and located about ten billion light-years away . Another discovery is a giant ring-like formation of GRBs with a diameter of 1720 Mpc, which is much larger than typical voids or filaments and challenges the cosmological principle of homogeneity and isotropy .
Statistical Patterns and the Search for Limits
Analyses of the size distribution of superclusters indicate that the largest structures observed so far follow a power-law distribution, with no clear evidence of a maximum size. This suggests that even larger structures may be discovered as surveys probe deeper into the universe, and the scale at which the universe becomes homogeneous may be larger than currently observed .
Alignment and Coherence Across Vast Distances
Observations have also revealed that the rotation axes of quasars, which reside in the centers of galaxies, can be aligned over billions of light-years, matching the orientation of the cosmic web structures they inhabit. This coherence across such vast distances further highlights the interconnectedness of the universe’s largest structures .
Conclusion
The largest structures in the universe—superclusters, walls, and formations traced by gamma-ray bursts—span hundreds to thousands of megaparsecs and contain a significant portion of the universe’s matter and galaxies. While the discovery of ever-larger structures continues to challenge our understanding of cosmic homogeneity, current cosmological models can accommodate these findings. Ongoing and future surveys are likely to reveal even more colossal structures, pushing the boundaries of our knowledge about the universe’s grandest scales 1246+3 MORE.
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Unveiling the largest structures in the nearby Universe: Discovery of the Quipu superstructure
The Quipu superstructure, with a length of over 400 Mpc, is the largest cosmic structure discovered to date, containing 45% of galaxy clusters, 30% of galaxies, 25% of matter, and occupying a major part of the Universe.
Large-Scale Structures in the Universe
Large-scale structures in the universe are well-recognized, with galaxies and redshifts as key indicators, and understanding their origins and evolution is crucial for understanding the cosmic microwave background and their evolution.
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