+A **galaxy cluster** is one of the largest known gravitationally bound structures, a colossal gathering of hundreds to thousands of [galaxy](/wiki/galaxy) members. These cosmic cities are brimming with hot gas and an unseen web of [dark matter](/wiki/dark_matter), shaping the large-scale tapestry of the cosmos.
+## See also
+- [Supercluster](/wiki/supercluster)
+- [Cosmic Web](/wiki/cosmic_web)
+- [Gravity](/wiki/gravity)
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