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Star Clusters and Associations

  • Hannu Karttunen
  • Pekka Kröger
  • Heikki Oja
  • Markku Poutanen
  • Karl Johan Donner

Abstract

Several collections of stars can be picked out in the sky, even with the naked eye. Closer study reveals that they really do form separate clusters in space. E.g. the Pleiades in Taurus and the Hyades around Aldebaran, the brightest star in Taurus, are such open star clusters. Almost the whole of the constellation Coma Berenices is also an open star cluster. Many objects appearing as nebulous patches to the unaided eye, when looked at with a telescope, turn out to be star clusters, like Praesepe in the constellation Cancer, or Misan, the double cluster in Perseus (Fig. 16.1). In addition to open clusters some apparently nebulous objects are very dense globular clusters, such as those in Hercules and in Canes Venatici (Fig. 16.2).

Keywords

Open Cluster Globular Cluster Main Sequence Proper Motion Star Cluster 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Further Reading

  1. Hanes, Madore (eds.): Globular Clusters, Cambridge University Press 1980.Google Scholar
  2. Spitzer: Dynamical Evolution of Globular Clusters,Princeton University Press 1987.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Hannu Karttunen
    • 1
  • Pekka Kröger
    • 2
  • Heikki Oja
    • 3
  • Markku Poutanen
    • 4
  • Karl Johan Donner
    • 5
  1. 1.Tuorla ObservatoryUniversity of TurkuPiikkiöFinland
  2. 2.HelsinkiFinland
  3. 3.Observatory and University of HelsinkiHelsinkiFinland
  4. 4.Finnish Geodetic InstituteMasalaFinland
  5. 5.Finnish Geodetic InstituteHelsinkiFinland

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