intergalactic collisions

The scientists observed two groups of galaxies rushing at each other at 4.6 million kilometers per hour, preparing to form a large cluster.

Astronomers have found a solution to the birth of these

Large galaxies feed on small galaxies or bump into other large galaxies to form a more massive galaxy.

NASA said, the human galaxy will collide with the nearest galaxy, Andromeda (M31), for about four billion years. Experts about the universe said, if a collision between the two