Dictionary term
Astronomical Almanac
Direct answer
Astronomical Almanac: The Astronomical Almanac is an annual technical reference containing authoritative astronomical and geodetic data for use by observatories, navigators, surveyors, scientists, and software developers.
The Astronomical Almanac is an annual authoritative reference for precise astronomical data.
An engraved functional orientation; the page explains the real instrument, method, or publication.Quick reference
- Use when
- Use the Astronomical Almanac or its official data services for precision work, citing the edition, table, time scale, coordinate frame, and any interpolation.
- Do not use it for
- Do not copy a value without its units, epoch, reference frame, and time scale or assume an older edition represents current standards.
- Reference category
- Historical Almanacs & Instruments
- Related terms
- Almanac, Nautical Almanac, Astrolabe, Armillary Sphere
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The story behind Astronomical Almanac
National observatories developed annual ephemerides for navigation and astronomy; the current publication continues a long collaboration between the U.S. and U.K. nautical almanac offices.
Astronomical Almanac in spiritual tradition
The Astronomical Almanac represents patient international work that makes exact sky knowledge shareable.
Astronomical Almanac: fact and faith, kept distinct
This is a factual astronomy, calendar, Earth-science, cultural, or historical reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Astronomical Almanac in numerology
Astronomical Almanac 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 Astronomical Almanac matters
It supplies documented positions, time scales, constants, and phenomena that allow independent calculations to share a common reference system.
Astronomical Almanac at work: an example
A researcher may consult the almanac for apparent positions, Earth-orientation quantities, or definitions used in an observing calculation.
Where interpretation stops
Astronomical Almanac 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:
- U.S. Naval Observatory: Astronomical and Navigational Almanacs - Official description of current Astronomical Almanac and Nautical Almanac publications.
- U.S. Naval Observatory: Astronomical Almanac Glossary - Reference definitions for astronomical coordinates, events, calendars, and time scales.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Also appears in
- Historical Almanacs & Instruments
- Aliases
- None listed
- Last updated
- 2026-07-15
Consult official astronomical tables
Astronomical Almanac in a book is one thing; Astronomical Almanac 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 Historical Almanacs & Instruments
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Common questions
What is Astronomical Almanac?
The Astronomical Almanac is an annual technical reference containing authoritative astronomical and geodetic data for use by observatories, navigators, surveyors, scientists, and software developers.
How is Astronomical Almanac used in an almanac?
Use the Astronomical Almanac or its official data services for precision work, citing the edition, table, time scale, coordinate frame, and any interpolation.
What should I avoid when interpreting Astronomical Almanac?
Do not copy a value without its units, epoch, reference frame, and time scale or assume an older edition represents current standards.
