Aphelion is the point in a planet's or comet's orbit where it is farthest from the Sun. The Earth's aphelion is 152,098,232 km.
It is about 249,209,000 kilometers from the Sun, at aphelion.
At aphelion Neptune is 4540 million kilometres from the Sun. This is the furthest that Neptune gets from the Sun because that is what aphelion refers to.
Mercury's aphelion, or the part of its orbit that is farthest from the sun, is 43.4 million miles. Although this is the closest aphelion of any planet in the solar system, it gets within 25 million miles of Venus's aphelion.
Saturn at aphelion is about 1503 million kilometers from the Sun.
The Earth's aphelion is when it reaches it point in orbit farthest from the sun. An example sentence is: She thinks she feels it when the Earth reaches it's aphelion.
Perihelion is the point at which a planet is closest to the Sun in it's elliptical orbit. Aphelion is when it is furthest.
Neptune is located at aphelion in its orbit. It is the furthest from the Sun while it is in its orbit.
Aphelion describes the furthest point in a planetary orbit.