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)
More in Space
- There are more stars in the observable universe than grains of sand on all of Earth's beaches—estimated at 10^24 stars versus roughly 10^18 to 10^19 grains.
- The footprints left by Apollo astronauts on the Moon will likely remain visible for millions of years because there is no wind or water to erase them.
- A day on Venus is longer than its year—Venus takes 243 Earth days to rotate once but only 225 Earth days to orbit the Sun.
- Saturn's moon Titan has lakes and rivers of liquid methane and ethane, making it the only body in our solar system besides Earth with stable surface liquids.