The burst was caused by the collision of two neutron stars 3.9 billion light years from Earth, and lasted only two-tenths of a second. However the infrared glow left behind by the event suggested the formation of a large amount of heavy metals.
It is thought that most of the heavier elements in the universe were produced during supernova explosions. However, gamma-ray bursts are so energetic, they can produce metals such as gold.
The Bolshoi Simulation, “the most accurate cosmological simulation of the evolution of the large-scale structure of the universe yet made”.
What is actually being shown above is a visualization of dark matter in a small fraction of the actual simulation. Visit the Bolshoi website at the University of California High-Performance AstroComputing Center for more information and visuals.