![[Astronomy Answers]](../../pic/pr.gif "Astronomy Answers"){kind=small}
![[Dictionary]](../../pic/glossary.gif "Dictionary"){kind=small}
![[AnswerBook]](../../pic/book.gif "AnswerBook"){kind=small}
![[Universe Family Tree]](../../pic/tree.gif "Universe Family Tree"){kind=small}
![[Science]](../../pic/science.gif "Science"){kind=small}
![[Starry Sky]](../../pic/sterren.gif "Starry Sky"){kind=small}
![[Planet Positions]](../../pic/planeet.gif "Planet Positions"){kind=small}
![[Calculate]](../../pic/reken.gif "Calculate"){kind=small}
![[Colophon]](../../pic/copybtn.gif "Colophon"){kind=small}
\(\def\|{&}\DeclareMathOperator{\D}{\bigtriangleup\!} \DeclareMathOperator{\d}{\text{d}\!}\)
| 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.
![[Tree]](../../pic/docsupar.gif "Tree"){kind=small}
![[Galaxy]](../../pic/docsleft.gif "Galaxy"){kind=small}
![[Star System]](../../pic/docsrigh.gif "Star System"){kind=small}
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Last updated: 2021-07-19