In galaxy clusters, most of the galaxies appear to be elliptical galaxies because O They formed in-situ from low-angular-momentum clouds O They aren't really elliptical, but they look that way because they are very distant O When galaxies collect in clusters, the proximity makes them puffier Galaxies in clusters probably had many merger events in the past

In galaxy clusters, most of the galaxies appear to be elliptical galaxies because O They formed in-situ from low-angular-momentum clouds O They aren't really elliptical, but they look that way because they are very distant O When galaxies collect in clusters, the proximity makes them puffier Galaxies in clusters probably had many merger events in the past