In September 2005 the Swift satellite from NASA picked up a gamma ray burst called GRB 050904. This explosion happened 12.8 billion years ago when the Universe was supposedly only 890 million years old.
This gives us some more insight about the early Universe.
"This means that not only did stars form in this short period of time after the Big Bang, but also that enough time had elapsed for them to evolve and collapse into black holes," Cusumano added.
Black holes have a gravitation pull so strong that nothing, not even light, can escape from them. Gamma ray bursts are thought to be generated by the collapse of massive stars to form black holes.