What is the difference between Open and Globular Clusters?
"What has become clear in the past 25 years is that the way astronomers have traditionally characterized star clusters — classing them as either open or globular, the two forms seen in our home galaxy — no longer holds up."
Stellar archaeology
Star clusters in the Milky Way come in two distinct flavors — open and globular But other galaxies show these objects may be more alike than we thought.
https://astronomy.com/magazine/2019/...Lv5a5nSrMYcGv4