https://www.vice.com/en_us/article/g5gjzm/a-structure-in-deep-space-is-so-giant-its-challenging-standard-physics

Scientists have discovered a structure in the distant universe so immense that it is actually challenging our understanding of the universe. 

Known as the Giant Arc, this crescent-shaped stream of galaxies stretches across 3.3 billion light years, making it about one-fifteenth the radius of the entire observable universe.