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The newfound LQC is composed of 73 quasars and spans about 1.6 billion light-years in most directions, though it is 4 billion light-years across at its widest point. To put that mind-boggling size into perspective, the disk of the Milky Way galaxy â home of Earth's solar system â is about 100,000 light-years wide.
Currently, scientists believe that the largest star in the known universe is NML Cygni, a red hypergiant found in the Cygnus constellation. Discovered by astronomers Neugebauer, Martz & Leighton (from where it gets its designation âNMLâ) in 1965, it measures 1,650 solar radii (1,147,575,000 KM).