Sky science
Mean Motion Resonance
Direct answer
Mean Motion Resonance is an orbital resonance tied to a near-integer ratio of average angular orbital rates.
It couples bodies through commensurate mean motions.
$0 today, then $12/month after 7 days. Cancel anytime.
At a glance
- Found in
- Astronomy & Skywatching
- Related
- Escape Velocity, Orbital Resonance, Lagrange Point, Hill Sphere
It couples bodies through commensurate mean motions.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.
What does your own chart say about you?
Choose love, work or purpose. Your reading is written from your chart. Your reading uses your own birth details.
Walk through Alex’s whole example first
The Road of AgesSee the turning points of your whole life, from your birth date
See your road's shape
Prefer to explore first?
The Road of AgesThe turning points of your whole life, from your own chart
Walk my road
Free, by email
Your daily Almanac letter
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
The story behind Mean Motion Resonance
Celestial mechanicians used perturbation theory to identify resonant terms and stability zones.
A one-minute story
The Wandering Stars
How the moving planets were watched, named and found, and what a transit is.
Why Mean Motion Resonance matters
Mean Motion Resonance explains structured gaps, rings, satellite relations, and protected small-body orbits.
How to read Mean Motion Resonance
Confirm a resonant argument librates before declaring resonance.
Mean Motion Resonance in practice: an example
Jupiter’s resonances help create Kirkwood gaps in the asteroid belt.
Where readings of Mean Motion Resonance go wrong
Mean motion is an average; instantaneous angular speeds can differ strongly.
Sources and editorial method
Research references used for this entry include:
- NASA Science: Solar System Exploration - NASA overview of planets, moons, small bodies, rings, and the structure of the Solar System.
- NASA Science: Universe Glossary - NASA definitions for common stellar, galactic, orbital, and high-energy astronomy terms.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Last updated
- 2026-09-26
Map a mean-motion resonance
A definition tells you what it is; your own birth chart tells you what it means for you. The Oracle casts your real chart and answers for your love, your work, and your year ahead, in conversation. It opens with the 7-day Seeker trial.
Speak with the OracleRelated terms
More in Astronomy & Skywatching
- Phase Angle
- Reference Epoch
- Solar Prominence
- True Anomaly
- Apparent Magnitude
- Brown Dwarf
- Elliptical Orbit
From the reference page to your own chart
Every word here
is in your own chart.
- A personal reading about love, work or purpose, written from your chart
- A practical next step to consider
- It opens with 7 days free, with the AI Oracle and daily guidance
$0 today, then $12/month after 7 days. Cancel anytime.
Common questions
What is Mean Motion Resonance?
Mean Motion Resonance is an orbital resonance tied to a near-integer ratio of average angular orbital rates.
What do people get wrong about Mean Motion Resonance?
Mean motion is an average; instantaneous angular speeds can differ strongly.
Free, by email
The Almanac, in your inbox at 7
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
