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Definitions from WordNet

Definitions from the Web

Perihelion

Description:

The term "perihelion" refers to the point in the orbit of a planet or other celestial object where it is closest to the sun. In astronomy, it is often used to describe the position of a planet or a comet.

Examples :

1. The Earth reaches perihelion in early January, when it is closest to the sun.
2. Comets have highly elliptical orbits, and their perihelion can bring them extremely close to the sun.
3. Mercury has the shortest distance to travel to reach perihelion compared to the other planets in our solar system.

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