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Definition. Aphelion is the point in an object's orbit around the Sun where it is farthest from the Sun. This term is significant because it plays a crucial role in understanding the elliptical orbits of planets, as described by Kepler's laws of planetary motion.
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.
The greatest distance between the Sun and the planet, is known as the aphelion (from the Greek apo = away from and helios = Sun). At this point in the orbit, the planet is moving at its slowest speed (Kepler’s Second Law). The aphelion refers specifically to orbits around the Sun, and is equivalent to the apoapsis of a general orbit.
Definition. Aphelion is the point in the orbit of a planet, asteroid, or comet where it is farthest from the Sun. It is one of two extreme points in an elliptical orbit, the other being perihelion.
Aphelion is the point in the orbit of a celestial body where it is farthest from the Sun. It is crucial for understanding variations in orbital mechanics and energy computations.
Aphelion is the point in a planet's or other celestial body's orbit around the Sun when it is farthest from the Sun. This term is particularly relevant in the context of satellites and Kepler's laws, as it describes a key characteristic of the elliptical orbits observed in our solar system.
Aphelion and Perihelion refer to the furthest and closest points in a planet’s orbit around the Sun, respectively. The speed of a celestial body varies in its orbit, moving slower at Aphelion and faster at Perihelion.
