Dictionary term
Planisphere
Direct answer
Planisphere is a circular star chart whose movable mask shows the stars expected above the horizon for a chosen date and time.
Planisphere is a rotating sky map used in historical astronomy, timekeeping, or navigation.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Also appears in
- Historical Almanacs & Instruments
- Aliases
- None listed
- Last updated
- 2026-07-16
Quick reference
- Use when
- Use Planisphere by selecting a model for the observer's latitude and aligning local date and time with the correct daylight-saving adjustment.
- Do not use it for
- A planisphere is approximate near its latitude limits and does not predict clouds, planets, or exact horizon obstructions.
- Reference category
- Historical Almanacs & Instruments
- Related terms
- Lunar Distance Table, Star Atlas, Volvelle, Calendar Wheel
The story behind Planisphere
Portable planispheres popularized older rotating-chart principles as simple educational sky guides.
Planisphere in spiritual tradition
Planisphere rewards careful observation, explicit assumptions, and humility about the limits of every model or measurement.
The Great Almanac frames Planisphere with educational restraint. Mystical or symbolic language may be meaningful, but it should not be exaggerated into certainty, panic, or permission to ignore ordinary responsibility.
Planisphere in the Bible
This is a factual history-of-science, instrument, timekeeping, or navigation reference. It may support wonder and disciplined attention without becoming a claim of fate, worship, or private revelation.
Planisphere in numerology
Planisphere 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 Planisphere matters
Planisphere matters because it teaches the seasonal rotation of the visible sky without needing power or a live connection.
Example in a reading: Setting a northern planisphere to 10 p.m. on an October date reveals which constellations should be above the local horizon.
Interpretive caution: A planisphere is approximate near its latitude limits and does not predict clouds, planets, or exact horizon obstructions.
How Planisphere is used in a reading
Use Planisphere by selecting a model for the observer's latitude and aligning local date and time with the correct daylight-saving adjustment.
Where interpretation stops
Planisphere 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:
- Royal Museums Greenwich: Astronomical and Navigational Instruments - Museum reference collection for historical observing, calculating, timekeeping, and navigation instruments.
- U.S. Naval Observatory: Astronomical Applications Data Services - Authoritative services for positions, rise and set data, phases, seasons, eclipses, and astronomical dates.
The page starts with a direct definition, then separates use, example, caution, spiritual meaning, and historical context. For astrology, occult, demonology, curse, and spiritual warfare terms, the editorial rule is to explain the term without making fear-based, fatalistic, medical, legal, financial, or ritual-instruction claims.
Continue learning
Move from the historical instrument into a modern live view of the sky, space weather, and universal timing.
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These related entries help place Planisphere inside a wider reference cluster instead of leaving it as a standalone keyword.
