The perihelion is the point in the orbit of a planet, minor planet, or comet, where it
is nearest to its point of orbit, generally a star. It is the opposite of
a·phe·li·on n. pl. a·phe·li·a (-lē-ə). The point on the orbit of a celestial body that is farthest from the sun. [From New Latin aphēlium : Greek apo-, apo- + Greek ...
Dec 14, 2005
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun.
the point farthest from the sun in the orbit of a planet or comet, or of a man-made
satellite in orbit around the sun. Origin of