noun🔗Share近日点The point in the elliptical orbit of a planet or comet etc. where it is nearest to the Sun"Earth reaches its perihelion in early January, making that time of year when our planet is closest to the Sun. "地球は1月初旬に近日点に達し、この時期が地球が太陽に最も近づく時期となります。astronomyspacesciencephysicsChat with AIVocabulary GamePractice Reading