open cluster

The Pleiades

open cluster, in astronomy, any group of young stars held together by mutual gravitation. See star cluster.

This article was most recently revised and updated by Amy Tikkanen.

Citation Information

Article Title: open cluster

Website Name: Encyclopaedia Britannica

Publisher: Encyclopaedia Britannica, Inc.

Date Published: 10 November 2014

Access Date: February 22, 2025