The End of Cosmic Dawn: Finishing the Debate of Two Decades
A schematic representation of a look into cosmic history provided by the bright glow of a distant quasar. Observing with a telescope (bottom left) allows us to gain information about the so-called reionization epoch (top right “bubble”) that followed the Big Bang phase (top right). Credit: Carnegie Institution for Science / MPIA (annotated) Astronomers determined the time when all of the neutral hydrogen gas between galaxies was produced by Big Bang The Big Bang is the leading cosmological model that explains how the universe as we know it began approximately 13.8 billion years ago. ” data-gt-translate-attributes=”[{” attribute=””>Big Bang became fully ionized. A group of astronomers has robustly timed the end of the epoch of reionization of the neutral hydrogen gas to approximately 1.1 billion years after the Big Bang. Reionization began when the first generation of stars formed after the cosmic “dark ages,” a long period when the Universe was filled with neutral gas alone witho