Sky science
Barycenter
Direct answer
Barycenter: A Barycenter is the shared center of mass around which two or more gravitationally bound bodies move.
It is the balance point of an orbiting system.
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At a glance
- Found in
- Astronomy & Skywatching
- Related
- Ascending Orbital Node, Descending Orbital Node, Center of Mass Orbit, Two-Body Problem
It is the balance point of an orbiting system.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.
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The story behind Barycenter
Newtonian mechanics made shared center-of-mass motion explicit.
A one-minute story
The Wandering Stars
How the moving planets were watched, named and found, and what a transit is.
Why Barycenter matters
Barycenter corrects the oversimplification that a smaller body alone circles a fixed larger one.
Barycenter in practice: an example
The Sun and Jupiter both orbit their changing system barycenter.
Where readings of Barycenter go wrong
A barycenter may lie inside one body and is not necessarily a material object.
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
Find a system’s gravitational balance point
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More in Astronomy & Skywatching
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Common questions
What is a Barycenter?
A Barycenter is the shared center of mass around which two or more gravitationally bound bodies move.
What do people get wrong about a Barycenter?
A barycenter may lie inside one body and is not necessarily a material object.
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