There's nothing theoretical about it. Galaxies collide all the time.
Oneironaut Reviewed by Oneironaut on . theoretically (galaxies colliding) what would happen if two galaxies collided.... if space is infinite (which and alot of others believe) then technically, the galaxies may not be stationary and moving themselves... so what would (could, or what do you think) happen if two of them collided? Rating: 5