What are the characteristics of an open cluster of stars?

Question

Quizplus · Accepted Answer

Open clusters are groups of a few hundred, mainly main sequence stars that are loosely bound together by gravitational attraction. They are young enough that all the stars are roughly the same age, and they are typically found in the disk of the galaxy. While they can have a range of luminosities, they are not typically dominated by particularly massive stars. Open clusters typically have a few hundred stars that are mainly main sequence stars. They are not all necessarily the same age or luminosity. They are also usually found within or near the galactic plane. The other options listed do not accurately describe the characteristics of open clusters.

What Are the Characteristics of an Open Cluster of Stars