Definition

The location in a planet's or other celestial body's orbit where it is closest to the sun.

Example

Earth reaches its perihelion in early January each year.

Conversation

Did you know that Earth reaches its perihelion in early January?

Really? I had no idea it happened so soon in the year.

Yeah, it's the closest point to the sun during its orbit.

That's fascinating! I should look up more about the solar system.

Synonyms & Antonyms

Root Explanation

Perihelion is formed from "peri-" (meaning around) and "helios" (meaning sun in Greek). The term refers to the point in the orbit of a celestial body where it is closest to the sun.

Memory Tip

Think of being 'around' ('peri-') the 'sun' ('helios') to remember that perihelion is the point where a celestial body is closest to the sun.

Visually Confused Words