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Biggest Structure in Universe: Large Quasar Group Is 4 Billion Light Years Across

An international team of astronomers, led by academics from the University of Central Lancashire (UCLan), has found the largest known structure in the universe. The large quasar group (LQG) is so large that it would take a vehicle travelling at the speed of light some 4 billion years to cross it.

Roger G. Clowes, et al.
A structure in the early Universe at z ∼ 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology. 
Monthly Notices of the Royal Astronomical Society, January 11, 2013 DOI:10.1093/mnras/sts497

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