Astronomers see the 1st stars dispel darkness 13 billion years ago at 'Cosmic Dawn'

(Main) The Cosmic Microwave Background light left over from the very origin of the universe (Inset) the CLASS telescopes can detect cosmic microwave light signals from the Comic Dawn. .

Astronomers have used ground-based telescopes for the first time to peer back 13 billion years in time to observe the universe when the first stars first lifted the cosmic darkness.

This period, around 800 million years after the Big Bang, is known as "Cosmic Dawn," and it remains one of the most mysterious and important periods in the evolution of the universe.