The point in the orbit of a planet, asteroid, or comet at which it is farthest from the Sun. Earth reaches its aphelion around July 4th each year, when it is approximately 152.1 million kilometers from the Sun. The opposite of aphelion is perihelion.
The point in an orbit at which the object is closest to the Sun. Earth reaches perihelion around January 3rd at approxim...
The curved path of a celestial object around a star, planet, or moon under gravity's influence. Orbits can be circular, ...
A unit of measurement equal to the average distance between Earth and the Sun, approximately 149.6 million kilometers (9...
Dive deeper into aphelion and related concepts on Cosmos Observatory.