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Cluster may refer to:



  • Star cluster, referring to both open and globular clusters
  • Open cluster, a spherical collection of stars that orbits a galaxy in the galactic plane
  • Globular cluster, a spherical collection of stars whose orbit is either partially or completely in the halo of the parent galaxy. They are older, more densely populated, and contain more stars than open clusters.
  • Galaxy cluster, large gravitationally bound groups of galaxies, or groups of groups of galaxies
  • Supercluster, the largest gravitationally bound objects in the universe, composed of many galaxy clusters
  • Cluster mission, a European Space Agency mission to study the magnetosphere
  • Cluster (spacecraft)

Biology and health sciences[edit]

  • Cancer cluster, in biomedicine, an occurrence of a greater-than-expected number of cancer cases
  • Cluster headache, a neurological disease that involves an immense degree of pain
  • Cluster of differentiation, protocol used for the identification and investigation of cell surface molecules present on white blood cells.
  • Winter cluster, in beekeeping, a well-defined cluster of honey bees in cold temperatures
  • Cluster (epidemiology), a grouping of cases of disease
  • Genetic cluster, a group of genes (or proteins, or metabolites) whose expression or concentration is similar across a range of conditions


  • Computer cluster, a group of loosely coupled computers that work together closely
  • Data cluster, a group of disk sectors used in a File Allocation Table




Other uses[edit]