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Glossary term: Open Cluster

Description: Open clusters are clusters of stars found in our Milky Way and other galaxies. They are thought to be the result of a single star formation event and can consist of many hundreds or even thousands of stars. Open clusters are much less tightly graviationally bound than globular clusters and, in the Milky Way, are typically found in the Galactic disk. This loose binding means that over the course of hundreds of millions of years open clusters gradually dissolve into the general stellar population of the Milky Way. As groups of stars who all share a common age, open clusters make ideal laboratories to study stellar evolution. The Pleiades is perhaps the most famous open cluster in the sky.

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Term and definition status: This term and its definition is still awaiting approval

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