Open star clusters belong to the flat component of the Galaxy, and the stars that make up them are young (10 ^ 8 years old) with an increased content of heavy elements. Globular star clusters belong to the spherical component of the Galaxy; their stars are the stars of the first generation. The globular cluster contains 10 ^ 6 – 10 ^ 7 stars, which is three orders of magnitude more than the number of stars in the open cluster.
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.