The perihelion is the point in the orbit of a celestial body where it is nearest to its orbital focus, generally a star. It is the opposite of aphelion, which is the point in the orbit where the celestial body is farthest from its focus. The word "perihelion" stems from the Ancient Greek words "peri", meaning ...
Aphelion definition, Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun. See more.
Sep 21, 2014 ... Define aphelion: the point farthest from the sun in the path of an orbiting celestial body (such as a planet) compare perihelion.
Dec 14, 2005 ... The closest point to the Sun in a planet's orbit is called perihelion. The furthest point is called aphelion. Notice how the planet moves fastest at ...
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun.
a·phe·li·on n. pl. a·phe·li·a (-lē-ə). The point on the orbit of a celestial body that is farthest from the sun. [From New Latin aphēlium : Greek apo-, apo- + Greek ...
Conversely, the Earth is farthest away from the Sun, at the aphelion point, 2 weeks after the June Solstice, when the ... Astronomy Glossary - Terms & definitions ...
Aphelion definition: the point in its orbit when a planet or comet is at its greatest distance from the sun | Meaning, pronunciation, translations and examples.