APHELION (from Gr., from, and , sun), in astronomy, that point of the orbit of a planet at which it is most distant from the Sun. Apogee, Apocentre, Aposaturnium, etc. are terms applied to those points of the orbit of a body moving around a centre of force - as the Earth, Saturn, etc. - at which it is farthest from the central body.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)