Dark matter and normal matter 'divorce' in cosmic clash
Dark matter and normal matter 'divorce' in cosmic clashAfter two massive galaxy clusters collided, their gas slowed down but their dark matter continued on unimpeded
PHOTO IN THE NEWS: Cluster Smashup Is Dark Matter ProofA distant cousin of the famous "bullet cluster" shows the same separation of dark and ordinary matter occurring as its two parent galaxy clusters collide at high speed.
Colliding galaxies shed light on dark matterAstronomers have captured images of a powerful collision of galaxy clusters and say it may shed light on the behaviour of dark matter.