Aphelion
Definition
A secondary variant or graphical form of the neuter noun afeliu. It denotes the point in the orbit of a planet, comet, or other celestial body at which it is furthest from the Sun, being diametrically opposed to the perihelion.
Bilingual Equivalents
- Aphelion
- Furthest orbital point
Grammatical & Source Details
| Inflection Type | Feminine noun variation within standard technical registers, structurally parallel to the neuter form afeliu. |
| Formation | Scientific borrowing constructed from classical Greek roots describing spatial distance relative to the Sun. |
| Spelling / Pronunciation | [a.fe.ˈli.e] |
| Source | Lexicon of Cosmos Studies, Astrophysics Theories, and Orbital Mechanics |
Contextual Usage Examples
RO: Astronomul a calculat data exactă la care Pământul se va afla la afelie în cursul lunii iulie.
EN: The astronomer calculated the exact date on which the Earth will be at aphelion during the month of July.
RO: La afelie, distanța dintre planetă și centrul Soarelui atinge valoarea sa maximă absolută.
EN: At aphelion, the distance between the planet and the Sun's center reaches its absolute maximum value.
RO: Din cauza formei eliptice a orbitei, viteza cometei scade considerabil pe măsură ce se apropie de afelie.
EN: Due to the elliptical shape of the orbit, the comet's speed decreases considerably as it approaches aphelion.
Idioms & Phrases
La afelie / At aphelion
RO: Poziția spațială a unui corp cosmic în momentul în care vectorul său de rază heliocentrică are lungimea maximă.
EN: The spatial position of a cosmic body at the moment when its heliocentric radius vector reaches maximum length.
Orbită cu afelie pronunțată / Orbit with a pronounced aphelion / highly eccentric orbit
RO: Traiectorie eliptică foarte alungită, specifică cometelor, unde distanța de la afelie diferă enorm de cea de la periheliu.
EN: A highly elongated elliptical trajectory, specific to comets, where the aphelion distance differs vastly from the perihelion distance.
Calcul de afelie / Aphelion calculation / orbital modeling
RO: Procedură matematică astrofizică utilizată pentru a prezice coordonatele extreme ale unui satelit natural sau artificial.
EN: An astrophysical mathematical procedure used to predict the extreme coordinates of a natural or artificial satellite.
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