perihelion

Definitions of perihelion
1

n periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun

Antonyms:
aphelion
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun
Type of:
periapsis, point of periapsis
(astronomy) the point in an orbit closest to the body being orbited

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