A group of stars is a term used to describe various celestial bodies. A CLUSTER, which has seven letters, is a group of stars that are gravitationally bound and form a distinct structure. A GALAXY, which has six letters, is a large collection of stars, gas, and dust held together by gravity. A CONSTELLATION, which has thirteen letters, is a group of stars that form a recognizable pattern in the night sky. An asterism, which has eight letters, is a smaller pattern of stars that is part of a larger CONSTELLATION. Finally, a dreamteam, which has nine letters, is a slang term used to describe a group of people who are considered to be the best at what they do.