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aphelion

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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"aphelion." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 23 Apr. 2017 <http://www.encyclopedia.com>.

"aphelion." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (April 23, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphelion

"aphelion." The Oxford Pocket Dictionary of Current English. . Retrieved April 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphelion

aphelion

aphelion (astron.) point of a planet's or comet's orbit at which it is farthest from the sun. XVII. Graecized form (Kepler) of modL. aphēlium, f. APO- + Gr. hélios SUN, after L. apogæum APOGEE.

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"aphelion." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 23 Apr. 2017 <http://www.encyclopedia.com>.

"aphelion." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (April 23, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphelion-0

"aphelion." The Concise Oxford Dictionary of English Etymology. . Retrieved April 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphelion-0

aphelion

aphelion Point in the Earth's elliptical orbit at which the planet is farthest from the Sun. See also PERIHELION.

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"aphelion." A Dictionary of Earth Sciences. . Encyclopedia.com. 23 Apr. 2017 <http://www.encyclopedia.com>.

"aphelion." A Dictionary of Earth Sciences. . Encyclopedia.com. (April 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/aphelion

"aphelion." A Dictionary of Earth Sciences. . Retrieved April 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/aphelion

aphelion

aphelion (əfē´lēən, ăp´hē´–), point farthest from the sun in the orbit of a body about the sun. See apsis.

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"aphelion." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 23 Apr. 2017 <http://www.encyclopedia.com>.

"aphelion." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (April 23, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/aphelion

"aphelion." The Columbia Encyclopedia, 6th ed.. . Retrieved April 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/aphelion