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An open cluster is a system of related stars that usually originates from a common molecular cloud, comprised of dust and cosmic gases. Typically, an open cluster of stars originates in galaxies where active star formation is taking place, such as in spiral or irregular galaxies. Since they are present within a galaxy’s disk, open clusters may also be referred to as galactic clusters. Open cluster stars are usually relatively small in size, containing an average of several hundred to a few thousand individual stars. |
The open custer NGC 659, located in Cassiopeia |
Erasmus +
Open cluster
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