Astronomy Answers
Universe Family Tree: Star Cluster


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Type
: 
Galaxy
─── 
Star Cluster
─── 
Star System
    :
Globular Cluster
Galactic Cluster
OB Association
Stellar Stream
Size
: 
50 kpc
─── 
5 kpc
─── 
50,000 AU
Earth
: 
the Galaxy
─── 
(none)
─── 
the Solar System

A star cluster is a group of a few dozen to a few thousand stars that are bound by gravity or by a recent common origin. Star clusters come in different kinds:

Not all stars are part of a recognized star cluster. For instance, the Sun is a solitary star.



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Last updated: 2016−02−07