equatorial bulge


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equatorial bulge

n.
The gradual increase of the radius of a planet or star from the poles to the equator, resulting in a deviation from a perfect spherical shape, caused by the object's rotation.
References in periodicals archive ?
As tour guides and museum exhibits repeatedly reminded me, archaeological activities continue to reveal more about the people who lived in this part of the Andes, and how much they understood about living at the Earth's equatorial bulge.
If there's no ocean, Pluto should be comparatively flattened at its poles, containing a "fossil" equatorial bulge left over from early in its history, when the body was spinning more rapidly.
Otherwise, the moon's equatorial bulge would have continued to diminish, rather than to have been frozen in place.
These forces include pressure from sunlight, magnetic torques acting on charged dust particles, and the influence of slight variations in gravity due to the equatorial bulge of Saturn.