When galaxy clusters collided, the dark matter (blue) sailed forward of the traditional matter (orange)
W.M. Keck Observatory/Adam Makarenko
When two huge clusters of galaxies collided billions of years in the past, their dark matter shot proper out of them, forsaking the gasoline and stars that made up the stays of the clusters. Understanding this course of might assist us determine the character of dark matter and its results on the universe.
Clashes between galaxy clusters are troublesome to observe. We need to catch the collisions at precisely the proper time, and on the proper angle with respect to Earth, to…