Dictionary term
Inferior Conjunction
Direct answer
Inferior Conjunction occurs when Mercury or Venus passes between Earth and the Sun in heliocentric geometry.
It places an inner planet on the near side of the Sun.
It places an inner planet on the near side of the Sun.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Use a safe ephemeris or spacecraft view; do not search beside the Sun with ordinary optics.
- Do not use it for
- Most inferior conjunctions are not transits across the solar disk.
- Reference category
- Astronomy & Skywatching
- Related terms
- Greatest Elongation, Astronomical Opposition, Superior Conjunction, Planetary Transit
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The story behind Inferior Conjunction
Inferior and superior conjunctions distinguished the geometry of inner planets in heliocentric astronomy.
Inferior Conjunction: fact and faith, kept distinct
This is a factual astronomy reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Inferior Conjunction in numerology
Inferior Conjunction 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 Inferior Conjunction matters
It resets morning-evening apparitions and can produce a transit when latitude alignment is exact.
Inferior Conjunction at work: an example
Venus moves from evening visibility toward morning visibility around inferior conjunction.
Where interpretation stops
Inferior Conjunction 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 Almanac Glossary - Definitions for astronomical coordinates, time, reference systems, and observable phenomena.
- NASA Science: Solar System Exploration - NASA overview of planets, moons, small bodies, rings, and the structure of the Solar System.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Follow an inner planet past the Sun
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More in Astronomy & Skywatching
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Common questions
What is Inferior Conjunction?
Inferior Conjunction occurs when Mercury or Venus passes between Earth and the Sun in heliocentric geometry.
How is Inferior Conjunction used in an almanac?
Use a safe ephemeris or spacecraft view; do not search beside the Sun with ordinary optics.
What should I avoid when interpreting Inferior Conjunction?
Most inferior conjunctions are not transits across the solar disk.
