In the context of globular clusters, which of the following statements best describes their characteristics?
1
Globular clusters are loosely bound groups of stars that primarily consist of young, blue stars, similar to open clusters.
2
They are smaller than open clusters and have weak gravitational forces, leading them to disperse over time.
3
Globular clusters are tightly bound, spherical collections of tens of thousands to millions of older stars, with strong gravitational forces holding them together.
4
Globular clusters are primarily found in young, irregular galaxies, and their stars are typically short-lived.