 Due to the relatively vast distances between stars outside the galactic nucleus , collisions between stars are thought to be rare . In denser regions such as the core of globular clusters or the galactic center , collisions can be more common . Such collisions can produce what are known as blue stragglers . These abnormal stars have a higher surface temperature than the other main sequence stars with the same luminosity of the cluster to which it belongs . 
 Due to the relatively vast distances between stars outside the galactic nucleus , collisions between stars are thought to be rare . In denser regions such as the core of globular clusters or the galactic center , collisions can be more common . Such collisions can produce what are known as blue stragglers . These abnormal stars <a href='got' title='1'><mark>have</mark></a> a higher surface temperature than the other main sequence stars with the same luminosity of the cluster to which it <a href='uninflect' title='2'><mark>belongs</mark></a> . 
Due to the relatively vast distances between stars outside da galactic nucleus , collisions between stars are thought to be rare . In denser regions such as the core of globular clusters or tdagalactic center , collisions can be more common . Such collisions can produce what are known as blue stragglers . These abnormal stars got a higher surface temperature den thdather main sequence stars with thedame luminosity of the daster to which it belong .