Hurry for 100 points and ! good answers only! 14. give a short description of star clusters. describe (1) how they are held together, (2) how old they are, and (3) how astronomers categorize them. 15. what types of stars make up open clusters, and what is the fate of these stars? 16. describe the cluster that includes our own sun. 17. how do globular clusters differ from open clusters? 18. two star clusters visible to the naked eye are and

Hi!

14. Star clusters are held together by gravity. It really depends how old a star in the cluster is - it could be just born, or could have been born hundreds of billions of years ago. Astronomers categorize them by different colors, temperatures, sizes, brightness, etc. 

15. Open clusters eventually disperse to form field stars. 

16. Our sun is not part of a cluster (although it used to be). 

17. Globular clusters are found in the ring of a galaxy and usually contain more stars and are much older than the open clusters. 

18. Omega Centuari and M13. 

Hope this helps!