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aphelion n. 远日点 远日点 aphelion n 1: apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun [ant: {perihelion}] Aphelion \A*phel"ion\ (?; 277), n.; pl. {Aphelia}. [Gr. ? ?
sun.] (Astron.) That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion. [1913 Webster]
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