aphelion(redirected from aphelions)
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n. pl. a·phe·li·a (-lē-ə)
The point on the orbit of a celestial body that is farthest from the sun.
n, pl -lia (-lɪə)
(Astronomy) the point in its orbit when a planet or comet is at its greatest distance from the sun. Compare perihelion
[C17: from New Latin aphēlium (with pseudo-Greek ending -ion) from ap- + Greek hēlios sun]
a•phe•li•on(əˈfi li ən, əˈfil yən, æpˈhi li ən)
n., pl. a•phe•li•a (əˈfi li ə, əˈfil yə, æpˈhi li ə)
the point in the orbit of a planet or a comet at which it is farthest from the sun. Compare perihelion.
[1650–60; Hellenized form of New Latin aphēlium < Greek *aphḗlion (diástēma) off-sun (distance), neuter of *aphḗlios (adj.) =ap- ap-2 + -hēlios, adj. derivative of hḗlios sun. See apogee]
The point farthest from the sun in the orbit of a body, such as a planet or a comet, that travels around the sun.
the point in the orbit of a heavenly body where it is farthest from the sun. Cf. perihelion.See also: Astronomy
the point in the orbit of a heavenly body where it is farthest from the sun. See also perihelion.See also: Planets
The point in a planet’s orbit at which it is farthest from the Sun.
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|Noun||1.||aphelion - apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun|
apoapsis, point of apoapsis - (astronomy) the point in an orbit farthest from the body being orbited
perihelion - periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun