archive / atlas record
Omega Centauri
A massive cluster with unusually complex stellar populations.
- classification
- Globular cluster
- system
- Milky Way halo
Omega Centauri contains millions of old stars and a wider range of compositions than most globular clusters, prompting debate about its origin.
- Class
- Globular cluster
- Location / system
- Milky Way halo
- Distance
- About 17,000 light-years from Earth
Only values with an established scientific consensus are listed. Where a quantity is uncertain or model-dependent, it is discussed in the sections below rather than stated as data.
Overview (starter entry, expanded review pending)
Omega Centauri contains millions of old stars and a wider range of compositions than most globular clusters, prompting debate about its origin.
Astrometry and colour–magnitude analysis
Omega Centauri's member stars are identified through shared positions and motions. Their colours and luminosities are compared with stellar-evolution models to estimate age and distance.
- What remains least constrained about Omega Centauri?Composition, internal structure, formation history or local environment can require different observations and may remain model-dependent.
Items above are unresolved. Hypotheses are labelled as such and are not presented as confirmed findings.
CDS Strasbourg // verified 28 September 2026