Watch Galaxies Collide

A supercomputer simulation by UC Berkeley and RIT scientists of the collision of a dark matter-dominated dwarf galaxy with the Milky Way over the past billion years. The collision generated ripples in the gas (blue) that were used to pinpoint the position of the dark-matter galaxy today. The right panel shows how the stars in the galaxy reacted to the collision. Video by Roxanne Makasdjian and Stephen McNally Simulation provided by Sukanya Chakrabarti video, RIT For more information about this research, v