If they collide, the chance of individual stars colliding with each other is extremely low, but instead the two galaxies will merge to form a single elliptical galaxy over the course of about a billion years.
The cluster contains a large number of rare, evolved, high-mass stars, including: 6 yellow hypergiants, 4 red supergiants, 24 Wolf-Rayet stars, a luminous blue variable, many OB supergiants, and an unusual supergiant sgBe star which has been proposed to be the remnant of a recent stellar merger.
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