EVERYDAY SCIENCE

Detailed explanation-1: -Collisions do distort a galaxy’s shape and computer models show that collisions between spiral galaxies can eventually make ellipticals. Several billion years from now, our own Milky Way galaxy is destined for a collision with the neighboring spiral Andromeda galaxy.

Detailed explanation-2: -We also see irregular galaxies closer to home, though. Some may form when two galaxies pass close together in a near-miss. When this happens, their gravity pulls stars out of place in both galaxies, messing up the neat structure they originally had as spiral or elliptical galaxies.

Detailed explanation-3: -The third of all types, irregular galaxies have no regular shape and have oddly spread stars and dark matter that are bound together by the force of gravity.

Detailed explanation-4: -The centrifugal force of the spinning gas cloud along with the gravitational pull within the clouds work together to give a galaxy its shape. All galaxies began with an elliptical shape, which is mostly a result of the centrifugal force of the spinning gas cloud.