What is an open cluster?
Open cluster is a system of related stars that usually come from a common molecular cloud, composed of dust and space gases. Usually open cluster of stars comes from galaxies, where stars are active, for example in a spiral or irregular galaxies. Because the galaxies are present, open clusters can also be referred to as galactic clusters . Open clusters are usually relatively small in size, which contains an average of several hundred to several thousand individual stars.
In the Milky Way galaxy, approximately 1,100 open clusters have been identified, although many scientists believe it is only a small number of the number of open clusters that actually exist. Open clusters can sometimes be seen with the naked eye. Pleiades, Hyady and Cluster Alpha Persei are examples of visible open clusters. Other clusters, such as double cluster, can only be seen using binoculars or binoculars.
sdehty in oThe tuned cluster is relatively young, usually less than several hundred million years old. Scientists can estimate the age of open clusters by examining the ratio of blue, yellow and red stars in clusters. Clusters that have more blue stars are usually younger than clusters with more red and yellow stars.
In general, every Open Cluster star shares several key characteristics. In this way, open clusters can offer scientists and astrophysics the ability to study the impact of variables on the properties of the stars more easily. The stars in the open cluster are usually comparable in both age and initial chemical makeup. In addition, these stars are usually distributed at about the same distance from the ground.
Open cluster stars usually have different mass. These masses move in size, with the largest stars in the young cluster, including approximately 80 to 100 solar mass. Smaller starsHOU be less than 0.08 solar materials.
open clusters are usually freely bound to each other by gravity. However, they can disruption when they orbit the galactic center. This disruption is often caused when they experience close encounters with gas clouds or other clusters. They can also lose individual stars through internal nearby meetings.
Some scientists estimate that open clusters have been lost for about a billion years, some of which are driving to the far side of the galaxy and others to the near side. The time period for this paycheck may vary depending on the initial density of the cluster. A firmly wrapped cluster often takes a longer time than a freely charged cluster.