When galaxy clusters collided, the darkish 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 darkish matter shot proper out of them, abandoning the fuel and stars that made up the stays of the clusters. Understanding this course of may assist us work out the character of darkish matter and its results on the universe.
Clashes between galaxy clusters are troublesome to look at. We have now to catch the collisions at precisely the precise time, and on the proper angle with respect to Earth, to…