Gamma Ray Bursts: one of the most disruptive events in the universe!!!
Once a day a remarkable event is observed in the universe: a gamma ray burst (GRB)! Gamma Ray Bursts are collimated energy sources which last from seconds to several hours and having the same energy content our Sun has released in 10 Billions of years!!! Just think about! Are you not impressed? What's wrong with you? (This artist’s impression of a gamma-ray burst shows the two intense beams of relativistic matter emitted by the black hole. To be visible from Earth, the beams must be pointing directly towards us. (Image: NASA/Swift/Mary Pat Hrybyk-Keith and John Jones) source: universetoday.com ) What does originate a GRB? Even if these events were discovered in the last '60 no-one knows for sure how they originate. The best guess is that they come from the collapse of very massive stars. This is also supported by the fact that the GRBs observed until now have been originated in distant galaxies rich in highly massive stars. All GRBs observed to date have o