The James Webb Space Telescope has revolutionized astronomy in just two years of operations, but how can it see a galaxy 33.8 billion light-years away in a universe that is only 13.8 billion years old?
Can the James Webb Space Telescope see galaxies over the universe's horizon?
Source: space
Source Link: https://www.space.com/james-webb-space-telescope-universe-expansion-photon-horizon