Association
Definition
An association is a group of stars that share a common origin and are gravitationally bound for a relatively short period of time. They are less concentrated than star clusters and often disperse after several million years.
5 Must Know Facts For Your Next Test
- Associations typically contain young, massive stars.
- They can be found in regions of active star formation.
- OB associations are the most well-known type, consisting mainly of O and B-type stars.
- The stars in an association move together through space, forming a loose grouping.
- Associations play a crucial role in understanding the early stages of stellar evolution.
Review Questions
- What type of stars are commonly found in OB associations?
- How long do associations typically remain gravitationally bound?
- In what regions are associations most commonly found?
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Related terms
Star Cluster: A group of stars that are gravitationally bound and formed from the same molecular cloud.
Stellar Evolution: The process by which a star changes over the course of time.
Main Sequence Star: A star that is in the longest-lasting stage of its lifecycle, where it fuses hydrogen into helium.
