Eccentricity

Astronomical Dictionary

Literally, not circular. The eccentricity of an ellipse (orbit) is the ratio of the distance between its focii and the major axis. The greater the eccentricity, the more 'flattened' is the ellipse. Venus has the least eccentric and Pluto has the most eccentric orbit of all the planets.

 
Astronomical [1] [2] [3] [4] [5] [6] [7] [8] [9]

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