Scientists to realize 1st light emerged in the Universe

traces of the earliest light in the universe had been detected thought to emanate from the first stars formed after the Big Bang

The Big Bang happened since billions of years ago 

 Nature stated on February 28, said researchers found the "fingerprint" of the universe's first light as background radiation left on hydrogen

"This is the first time we've seen any signal from this early in the Universe, aside from the afterglow of the Big Bang," Judd Bowman, an astronomer at Arizona State University who is the leader for this work 

Following the Big Bang, physicists believe there was only darkness in the universe for about 180 million years, a period known by scientists as Cosmic "Dark Ages."

As the universe expanded, the soup of ionized plasma created by the Big Bang slowly began to cool and form neutral hydrogen atoms, say physicists. Eventually these were pulled together by gravity and ignited to form stars.