Dictionary term
Horologium
Direct answer
Horologium is a faint southern constellation named for a pendulum clock and located between Eridanus, Dorado, and Reticulum.
Horologium is Lacaille's Clock, an inconspicuous far-southern constellation.
Horologium is Lacaille's Clock, an inconspicuous far-southern constellation.
A symbolic locator, not a substitute for an observational chart at a specific place and time.Quick reference
- Use when
- Use Achernar, the Large Magellanic Cloud, and a detailed chart to identify the sparse region.
- Do not use it for
- The constellation is not a celestial clock face and does not by itself indicate time.
- Reference category
- Constellations & Star Lore
- Related terms
- Grus, Hercules, Hydra, Hydrus
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The story behind Horologium
Lacaille introduced Horologium in the eighteenth century, originally depicting a clock with a pendulum.
Horologium in spiritual tradition
Horologium preserves a clock in the sky while reminding us that celestial time comes from measured motion.
Horologium: 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.
Horologium in numerology
Horologium 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 Horologium matters
It records the precision-timekeeping instruments central to the scientific age in which the southern sky was remapped.
Horologium at work: an example
Alpha Horologii is the sole star brighter than magnitude four and the best naked-eye confirmation.
Where interpretation stops
Horologium 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:
- International Astronomical Union: The Constellations - Official names, abbreviations, and boundaries for the 88 modern constellations.
- NASA Space Place: What Are Constellations? - NASA introduction to constellation regions, patterns, visibility, and seasonal sky changes.
- Source
- The Great Almanac Dictionary
- Category
- Constellations & Star Lore
- Also appears in
- Constellations & Star Lore
- Aliases
- None listed
- Last updated
- 2026-07-16
Find the Clock between river and clouds
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Common questions
What is Horologium?
Horologium is a faint southern constellation named for a pendulum clock and located between Eridanus, Dorado, and Reticulum.
How is Horologium used in an almanac?
Use Achernar, the Large Magellanic Cloud, and a detailed chart to identify the sparse region.
What should I avoid when interpreting Horologium?
The constellation is not a celestial clock face and does not by itself indicate time.
