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aphelion, in astronomy, the point in the orbit of a planet, comet, or other body most distant from the Sun. When Earth is at its aphelion in early July, it is about 4,800,000 km (3,000,000 miles) farther from the Sun than when at its perihelion in early January.
Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun.
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.
APHELION definition: 1. the point in an object's orbit (= a curved path in space around a planet or star) around the sun…. Learn more.
APHELION meaning: 1. the point in an object's orbit (= a curved path in space around a planet or star) around the sun…. Learn more.
The aphelion refers specifically to orbits around the Sun, and is equivalent to the apoapsis of a general orbit. A planet in an elliptical orbit around the Sun is furthest from the Sun at aphelion. Study Astronomy Online at Swinburne University.
29 maj 2018 · 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. The Oxford Pocket Dictionary of Current English. https://www.encyclopedia.
