Bright gamma-ray burst tests idea of event’s origins
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/11/NASA_GRB_free.jpg?fit=860%2C460&ssl=1)
The maps in this animation show how much brighter gamma-ray burst GRB 130427A was relative to the rest of the gamma rays in the sky. The left map shows the sky during a three-hour period prior to the outburst. The right map shows a three-hour period from 2.5 hours before the burst to 30 minutes into the event.
Fermi LAT Collaboration/DOE/NASA