Dictionary term
Achernar
Direct answer
Achernar is Alpha Eridani, a hot blue star at the southern end of Eridanus and one of the night sky's brightest stars.
Achernar is the brilliant southern end of the celestial River.
Achernar is the brilliant southern end of the celestial River.
A symbolic locator, not a substitute for an observational chart at a specific place and time.Quick reference
- Use when
- Use Achernar as the terminal landmark of Eridanus and as a guide toward Hydrus, Phoenix, and Tucana.
- Do not use it for
- Achernar was not the end star on the oldest surviving northern-limited versions of Eridanus.
- Reference category
- Constellations & Star Lore
- Related terms
- Capella, Procyon, Altair, Deneb
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The story behind Achernar
The Arabic-derived name means end of the river, reflecting the extension of Eridanus on later southern maps.
Achernar in spiritual tradition
Achernar shows that even a star's shape can bear the mark of motion.
Achernar: 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.
Achernar in numerology
Achernar 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 Achernar matters
Its rapid rotation makes it noticeably flattened, offering an important real example of rotational distortion in stars.
Achernar at work: an example
Interferometric observations reveal an equatorial diameter larger than its polar diameter.
Where interpretation stops
Achernar 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
Reach the River's brilliant end
Achernar in a book is one thing; Achernar 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.
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More in Constellations & Star Lore
Common questions
What is Achernar?
Achernar is Alpha Eridani, a hot blue star at the southern end of Eridanus and one of the night sky's brightest stars.
How is Achernar used in an almanac?
Use Achernar as the terminal landmark of Eridanus and as a guide toward Hydrus, Phoenix, and Tucana.
What should I avoid when interpreting Achernar?
Achernar was not the end star on the oldest surviving northern-limited versions of Eridanus.
