Cluster

'''''' may refer to:

== Science and technology == === Astronomy === Cluster (spacecraft), constellation of four European Space Agency spacecraft Cluster II (spacecraft), a European Space Agency mission to study the magnetosphere Asteroid cluster, a small asteroid family Galaxy cluster, the largest gravitationally bound groups of galaxies, or groups of groups of galaxies Supercluster, large spherical formations in the universe, composed of many galaxy clusters Star cluster Globular cluster, a spherical collection of stars whose orbit is either partially or completely in the halo of the parent galaxy Open cluster, a spherical collection of stars that orbits a galaxy in the galactic plane