An international team of astronomers has found a possible way to map the spread and structure of the Universe, guided by the light of quasars. This artist’s impression shows how ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun, may have looked. This quasar is the most distant yet found and is seen as it was just 770 million years after the Big Bang (ESO / M. Kornmesser) The new technique...
