Dictionary term
Gacrux
Direct answer
Gacrux is Gamma Crucis, a red giant marking the top of the Southern Cross.
Gacrux is the warm-colored upper star of Crux's long axis.
Gacrux is the warm-colored upper star of Crux's long axis.
A symbolic locator, not a substitute for an observational chart at a specific place and time.Quick reference
- Use when
- Identify Gacrux above Acrux, extend their axis past Acrux, and cross-check with the Southern Pointers.
- Do not use it for
- The pole estimate is approximate and false-cross patterns must be rejected before navigation use.
- Reference category
- Constellations & Star Lore
- Related terms
- Sadr, Albireo, Nunki, Alnair
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The story behind Gacrux
Its modern name contracts Gamma and Crux and is standardized by the IAU.
Gacrux in spiritual tradition
Gacrux lets color and direction meet at the top of a compact southern landmark.
Gacrux: fact and faith, kept distinct
This is a factual sky reference. It can support wonder and orientation without turning a measured position or inherited pattern into a claim of fate or private revelation.
Gacrux in numerology
Gacrux 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 Gacrux matters
Its line through Acrux supplies a principal naked-eye estimate of the direction toward the south celestial pole.
Gacrux at work: an example
Gacrux's orange-red hue contrasts clearly with the hotter blue-white stars elsewhere in Crux.
Where interpretation stops
Gacrux 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:
- IAU Division C Working Group on Star Names - Official IAU working group responsible for standardizing star names used in international astronomy.
- CDS SIMBAD Astronomical Database - Professional astronomical database for stellar identifiers, positions, classifications, and bibliography.
- Source
- The Great Almanac Dictionary
- Category
- Constellations & Star Lore
- Also appears in
- Constellations & Star Lore
- Aliases
- None listed
- Last updated
- 2026-07-16
Draw the Cross axis from Gacrux
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Common questions
What is Gacrux?
Gacrux is Gamma Crucis, a red giant marking the top of the Southern Cross.
How is Gacrux used in an almanac?
Identify Gacrux above Acrux, extend their axis past Acrux, and cross-check with the Southern Pointers.
What should I avoid when interpreting Gacrux?
The pole estimate is approximate and false-cross patterns must be rejected before navigation use.
