Dictionary term
Open Star Cluster
Direct answer
Open Star Cluster: An Open Star Cluster is a relatively young, loosely bound group of stars formed from the same molecular cloud.
It is a sparse stellar family in a galactic disk.
It is a sparse stellar family in a galactic disk.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Separate true members using position, motion, distance, and chemistry.
- Do not use it for
- Not every apparent star grouping is gravitationally or historically related.
- Reference category
- Astronomy & Skywatching
- Related terms
- Reflection Nebula, Dark Nebula, Globular Cluster, Spiral Galaxy
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The story behind Open Star Cluster
Proper-motion and color-magnitude studies transformed visual groupings into physical membership lists.
Open Star Cluster: fact and faith, kept distinct
This is a factual astronomy reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Open Star Cluster in numerology
Open Star Cluster is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Open Star Cluster matters
Shared age and composition make open clusters laboratories for stellar evolution.
Open Star Cluster at work: an example
The Pleiades contains hot young stars embedded in a broader moving population.
Where interpretation stops
Open Star Cluster is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
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: Universe Glossary - NASA definitions for common stellar, galactic, orbital, and high-energy astronomy terms.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Compare stars born together
Open Star Cluster in a book is one thing; Open Star Cluster in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
Speak with the OracleRelated terms
More in Astronomy & Skywatching
- Primary Mirror
- Secondary Mirror
- Stellar Parallax
- Active Galactic Nucleus
- Astronomical Spectroscopy
- Center of Mass Orbit
- Focal Ratio
- Keplerian Orbit
Common questions
What is Open Star Cluster?
An Open Star Cluster is a relatively young, loosely bound group of stars formed from the same molecular cloud.
How is Open Star Cluster used in an almanac?
Separate true members using position, motion, distance, and chemistry.
What should I avoid when interpreting Open Star Cluster?
Not every apparent star grouping is gravitationally or historically related.
