archive / atlas record
47 Tucanae
A dense sphere of ancient stars.
- classification
- Globular cluster
- system
- Milky Way halo
47 Tucanae is a massive globular cluster whose crowded core contains exotic stellar remnants and millisecond pulsars.
- Class
- Globular cluster
- Location / system
- Milky Way halo
- Distance
- About 13,000 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)
47 Tucanae is a massive globular cluster whose crowded core contains exotic stellar remnants and millisecond pulsars.
Astrometry and colour–magnitude analysis
47 Tucanae'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 47 Tucanae?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