What is included in the concept of “star cluster”? Compare open and globular clusters according to the following parameters: number of stars in the cluster, age of stars, types of stars, location of clusters in the Galaxy.
A star cluster is a group of stars that are located close to each other and are linked by mutual gravity. Globular clusters are hundreds of thousands, millions of stars. Age 11-13 billion years. Composition: red dwarfs, red giants and subgiants. Most are located near the center of the Galaxy.
Open clusters – several tens, hundreds of stars. Age – 1-2 billion years. Main sequence stars enter, located in the region of the galactic disk.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.