Small Black Holes Discovered In Cluster NGC 6397

Small Black Holes Discovered In Cluster NGC 6397:


The astronomers have discovered a concentration of smaller black holes in the cluster NGC 6397. Small black holes were discovered instead of one massive black hole at the heart of the cluster.

  • The Globular clusters are a dense stellar system that hosts the closely packed stars.
  • Such systems are typically very old. For instance, the cluster NGC 6397 is as old as the universe.
  • NGC 6397 cluster is located around 7,800 light-years away.
  • Thus, it is one of the closest globular clusters to the Planet Earth.
  • This cluster is also known as the Core-Collapsed Cluster because of its very dense nucleus.
  • The precise measurement of the stars in the cluster’s core was made with the Hubble Space Telescope.
    NGC 6397
  • The cluster is also known as Caldwell 86. It is a globular cluster lying in the constellation Ara.
  • The cluster is located around 7,800 light-years from Earth.
  • It comprises around 400,000 stars.
  • The cluster can be observed with naked-eye under good observing conditions.
  • This cluster is one among the at least 20 globular clusters in the Milky Way Galaxy which has gone through the core collapse.
  • Core collapse means the core has contracted to a dense stellar agglomeration.

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