aphelion
noun
aph·elion
a-ˈfēl-yən
ˌap-ˈhēl-
plural aphelia
a-ˈfēl-yə
ˌap-ˈhēl-
: the point farthest from the sun in the path of an orbiting celestial body (such as a planet) compare perihelion
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Merriam-Webster unabridged
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