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[uh-fee-lee-uhn, uh-feel-yuhn, ap-hee-lee-uhn]
Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun.
Source: Dictionary.com
aphelion | Define aphelion at Dictionary.com
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Perihelion and aphelion - Wikipedia


The perihelion is the point in the orbit of a celestial body where it is nearest to its orbital focus, generally a star. It is the opposite of aphelion, which is the point in the orbit where the cel...

Aphelion | Define Aphelion at Dictionary.com


Aphelion definition, Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun. See more.

Aphelion | Definition of Aphelion by Merriam-Webster


the point farthest from the sun in the path of an orbiting celestial body (such as a planet) — compare perihelion. See aphelion defined for kids ...

aphelion - definition of aphelion in English | Oxford Dictionaries


the point in the orbit of a planet, asteroid, or comet at... Meaning, pronunciation, example sentences, and more from Oxford Dictionaries.

aphelion - Dictionary Definition : Vocabulary.com


apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun.

Perihelion and Aphelion - Windows to the Universe


The closest point to the Sun in a planet's orbit is called perihelion. The furthest point is called aphelion. Notice how the planet moves fastest at perihelion and ...

Aphelion - definition of aphelion by The Free Dictionary


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 ...

Perihelion, Aphelion and the Solstices - Timeanddate.com


The Earth is closest to the Sun – at its Perihelion – about 2 weeks after the December Solstice and farthest from the Sun – at its Aphelion – about 2 weeks after ...