• Star cluster - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Star_cluster Star clusters or star clouds are groups of stars. Two types of star clusters can be distinguished: globular clusters are tight groups of hundreds or thousands of very ...
  • Star Clusters - A Review of the Universe

    universe-review.ca/F06-star-cluster.htm Stars do not occur in space at completely arbitrary places. Some, such as the Sun, are single (field star), but others are members of pairs or form multiple-star systems.
  • Star Clusters - SEDS Messier Database

    messier.seds.org/cluster.html Globular Globular clusters are gravitationally bound concentrations of approximately ten thousand to one million stars. They populate the halo or bulge of the Milky ...
    • star cluster | astronomy | Britannica.com

      www.britannica.com/topic/star-cluster Star cluster, either of two general types of stellar assemblages held together by the mutual gravitational attraction of its members, which are physically related ...
    • Pleiades star cluster: Famous Seven Sisters | Clusters ...

      earthsky.org/.../pleiades-star-cluster-enjoys-worldwide-renown Frosty November is often called the month of the Pleiades, because it's when this star cluster - sometimes called the Seven Sisters - shines from dusk until
    • Star Clusters - University of Oregon

      abyss.uoregon.edu/~js/ast122/lectures/lec15.html Variable Stars: Astronomers noticed that there was a gap in the HR diagram of old clusters. Stars, that are rarely found in this gap, were found to vary in their ...
    • Globular cluster - Wikipedia, the free encyclopedia

      en.wikipedia.org/wiki/Globular_cluster A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives ...
    • Star cluster - ScienceDaily

      www.sciencedaily.com/terms/star_cluster.htm Star clusters are groups of stars which are gravitationally bound. Two distinct types of star cluster can be distinguished: globular clusters are tight groups of ...
    • Star Clusters - Celestial Onjects on Sea and Sky

      www.seasky.org/celestial-objects/star-clusters.html Many stars in the universe are found grouped together as star clusters. Star clusters are groupings of stars held together by a common gravitational bond. They vary ...
    • BBC - Universe - Star clusters (pictures, video, facts & news)

      www.bbc.co.uk/science/space/universe/sights/star_clusters Watch videos from BBC programmes that are full of facts about star clusters and presented by easy-to-understand experts such as Brian Cox and Patrick Moore.