aphelion means the point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun. It carries an Arena rating of 1600, earned across 15 head-to-head judged battles.
Among words judged in Lexicurio's Arena, aphelion ranks #9 of 17,149 for Most Exacting Words, #74 of 17,124 for Most Sublime Words, #771 of 42,747 for Qualifying, #1,252 of 17,128 for Most Ponderous Words.
aphelion is pronounced /əˈfiː.lɪ.ən/.
Why “aphelion” is a great word
The point in an elliptical orbit where a celestial body is farthest from the Sun. From New Latin *aphēlium*, formed from Ancient Greek ἀπο- (apo-, 'away from') + ἥλιος (hēlios, 'sun'), modelled after New Latin *apogaeum* ('apogee'); first attested in English in the 1670s. Unlike "apogee" (which denotes the farthest point from Earth or any orbited body) or "perihelion" (the nearest point to the Sun), "aphelion" is a specific and solitary solar retreat. It is the quiet, cold apex of a planet's long outward arc, the moment of greatest solar indifference in a comet's fiery loop, the still point where a world's velocity slows to its most languid pace—the precise instant when the pull of home feels most like a memory rather than a force.
Etymology
From New Latin aphēlium (whence English aphelium, now displaced) + -ion (used in the names of other apsides). Aphelium was formed from Ancient Greek ἀπο- (apo-, prefix meaning ‘away, from, off’) + ἥλῐος (hḗlĭos, “the sun”) (ultimately from Proto-Indo-European *sóh₂wl̥ (“the sun”)), modelled after New Latin apogaeum (“apogee”). The plural form aphelia is from aphelion + -a (plural form of the suffix -on).
noun
- The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.e.g.“[I]t follows from the theory of gravity, that the aphelia of Mercury, Venus, the Earth, and Mars, slightly progress.” — 1837, William Whewell, “The Inductive Epoch of Newton—Discovery of the Universal Gravitation of Matter, according to the Law of the Inverse Square of the Distance”, in History of the Inductive Science
Definitions & examples from Wiktionary (CC BY-SA 3.0).
Words closest in meaning
By meaning, not spelling — each word's AI semantic fingerprint, nearest first.
- perihelion 82% match — The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun. vs aphelion →
- aphelium 73% match — Synonym of aphelion. vs aphelion →
- apastron 71% match — The point of greatest separation between a celestial object and the star which it orbits. vs aphelion →
- apobaryon 70% match — The furthest point of an astronomical object in an elliptical orbit to the center of mass of the system. vs aphelion →
- apogee 69% match — The point, in an orbit about the Earth, that is farthest from the Earth: the apoapsis of an Earth orbiter. vs aphelion →
- apocenter 69% match — The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse) vs aphelion →
- apoherm 68% match — In an orbit around the planet Mercury, the point that is most distant from Mercury. vs aphelion →
- apocynthion 67% match — The point in an orbit around the Moon that is most distant from that body. vs aphelion →