Sky science
Globular Cluster
Direct answer
Globular Cluster: A Globular Cluster is a dense, roughly spherical system of old stars gravitationally bound around a galaxy.
It is a compact ancient stellar population.
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At a glance
- Found in
- Astronomy & Skywatching
- Related
- Dark Nebula, Open Star Cluster, Spiral Galaxy, Elliptical Galaxy
It is a compact ancient stellar population.
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The story behind Globular Cluster
Globular clusters became key distance and population markers in twentieth-century galactic astronomy.
A one-minute story
The Wandering Stars
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Why Globular Cluster matters
Globular Cluster traces early galaxy history and provides tests of old stellar evolution and dynamics.
Globular Cluster in practice: an example
A telescope can resolve outer stars while the crowded core remains a granular glow.
Where readings of Globular Cluster go wrong
Globular clusters are far denser and generally older than open clusters.
Sources and editorial method
Research references used for this entry include:
- NASA Science: Stars - NASA overview of stellar birth, main-sequence evolution, giant phases, remnants, and supernovae.
- NASA Science: Galaxies - NASA overview of galaxy structure, types, groups, clusters, and the Milky Way.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Last updated
- 2026-09-26
Enter a dense sphere of old stars
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Common questions
What is a Globular Cluster?
A Globular Cluster is a dense, roughly spherical system of old stars gravitationally bound around a galaxy.
What do people get wrong about a Globular Cluster?
Globular clusters are far denser and generally older than open clusters.
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