The largest known structure in the universe is the Hercules-Corona Borealis Great Wall, a galactic filament spanning roughly 10 billion light-years.
Sources
- https://www.skyatnightmagazine.com/space-science/hercules-corona-borealis-great-wall (skyatnightmagazine.com)
- https://www.scienceabc.com/nature/universe/what-is-the-biggest-thing-in-the-universe (scienceabc.com)
- https://arxiv.org/pdf/2008.03679 (arxiv.org)
- https://www.sciencealert.com/largest-structure-in-the-universe-may-be-50-larger-than-we-thought (sciencealert.com)
- https://www.earth.com/news/largest-structure-in-universe-great-wall-hercules-corona-borealis-bigger-than-imagined/ (earth.com)
- https://scaleofuniverse.com/en/universe/hercules-corona-borealis-great-wall (scaleofuniverse.com)