Answer:
globular
open
Explanation:
A star cluster is a small group of stars found in galaxy. There are two types of star clusters:
Open and globular.
An open cluster contains about 100 stars. These are found in disk of galaxy. These are less dense group of stars containing young one.
A globular cluster is has thousands of stars tightly packed together. These are found in halo of galaxy and contain relatively old stars.
