Orbital mechanics · ρ = M / (4⁄3 π r³)

Mean Density

The average density of a body from its mass and radius — a clue to its composition. Earth's ~5510 kg/m³ points to a rock-and-iron world; the giant planets are far less dense.

Mass (M⊕)Radius (R⊕)

Mean density5513.4kg/m³

Formula: ρ = M / (4⁄3 π r³)

Worked example

With the default inputs, mean density evaluates to 5513.4 kg/m³ — Earth → ~5510 kg/m³. The validator recomputes this against the known value on every build, so the formula is checked, not asserted.

Highlights

›Earth: ~5510 kg/m³

Universal Gravitation

Knowledge connections

Associated withUniversal Gravitation

Sources

Facts on this topic will be cited from these primary and reference sources.

NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.

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Mean Density

Worked example

Highlights

The physics behind it

Knowledge connections

Sources

Mean Density

Worked example

Highlights

The physics behind it

Knowledge connections

Sources