Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Perihelion

A heavenly body which orbits its star takes an elliptical orbit with the star at one of the two foci.  The point where the body is nearest its star is called the perihelion, while the point at which it is furthest from its star is called the aphelion.

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