Which type of cluster is known to contain blue stragglers?

Blue stragglers are stars that appear to be younger and hotter than their surrounding stars, and they often exist within certain types of star clusters. Open clusters, which are relatively young and contain a mix of stars, provide the right conditions for the formation of blue stragglers. These clusters typically contain young, massive stars that may have experienced interactions or mergers, leading to the formation of blue stragglers.

The presence of blue stragglers in open clusters is notable because these clusters are characterized by their less dense stellar populations compared to globular clusters, allowing for the dynamic interactions that can result in blue stragglers.

The other types of clusters mentioned, such as globular clusters, are older and have a more stable stellar population, meaning that they do not typically form new stars or display blue stragglers in the same way as open clusters do. Nebular clusters, which refer to clusters formed within a nebula, wouldn't apply here as they aren't defined in the same context as traditional star clusters.

Thus, open clusters are the most likely inhabitants of blue stragglers due to their age, composition, and the dynamic processes occurring within them.