At the experimental site, the wonders of the distant universe between the two colliding galaxies are displayed: optical bridge, optical tail, twisted beam-shaped and disk-shaped galaxies between the two colliding galaxies.
Mathematical simulation experiments show that when two galaxies are approaching rapidly, the daughter galaxies in the gas clouds of the two galaxies do not contain themselves like the daughter galaxies in the disk galaxies. At this time, the star will form a bond between two galaxies close to each other, or form a strongly expanding spiral branch. The gas cloud will form a ring structure with a radius smaller than that of the circular surface of the star. The influence of neighboring galaxies will destroy the uniform motion of gas clouds along circular orbits, and they often collide with each other, thus strengthening the birth process of stars.
Hundreds of millions of years later, after the galaxies passed through the nearest point, the gravitational interaction between galaxies promoted the process of star formation, making the intensity of star formation peak, and the speed of star formation was 10 times higher than the normal star formation speed of isolated galaxies.