aphelion

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a·phe·li·on / əˈfēlyən; əˈfēlēən/ • n. (pl. a·phe·li·a / əfēlyə; əˈfēlēə/ or a·phe·li·ons) Astron. the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun: Mars is at aphelion. The opposite of perihelion.

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