How to use in-sentence of “star cluster”:
+ Super star cluster B, near the center of the galaxy, has older red giants and red supergiants.
+ A star cluster is a group of stars.
+ The cool supergiant population of the massive young star cluster RSGC1.
+ In a gravitationally-bound star cluster such as the Hyades, the stars formed at approximately the same age and lie at the same distance.
+ Apart from hosting some of the most massive and least-understood stars in the galaxy, Westerlund 1 is useful as an example of a relatively nearby, so easier to observe, super star cluster to help astronomers find out what happens in extragalactic super star clusters.
+ It is the most massive compact young star cluster known in the entire Local Group of galaxies.
+ The name Subaru is a Japanese word for a star cluster in the sky named Pleiades, and the company logo has the stars in its picture in the same place as they are in the sky.