A violent collision between a
pair of massive galaxy clusters 3 billion light - years from Earth has turned up the most direct evidence yet of dark matter, the invisible substance thought to make up 80 percent of the matter in the universe.
This animation illustrates how the powerful
gravity of a massive galaxy cluster bends and focuses the light from a supernova behind it, resulting in multiple images of the exploding star.
Later, computer simulations confirmed this and suggested the existence of dark matter, structured like a web, with long filaments that connect to each other at the
locations of massive galaxy clusters.
Some of the new results included deeper understandings of galaxies in the distant universe, more complete
pictures of the massive galaxy clusters, and the searches for exploding massive stars, called supernovae.