The burst, named GRB 050904, originated 12.8 billion light-years away, which means it occurred 12.8 billion years ago and the light took that long to reach us. It erupted very nearly at the beginning of time-the universe is about 13.7 billion years old.
Infant universe
The event provides the first glimpse of a star when the universe was in its infant stages. Until now, only entire galaxies had been observed so far away. For more checkout http://www.space.com/2132-flash-beginning-time-reveals-strange-event.html
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