perihelion
noun [ C or U ] physics specialized uk/ˌper.ɪˈhiː.li.ən/ us/ˌper.ɪˈhiː.li.ən/ perihelia /ˌper.ɪˈhiː.li.ə/ /ˌper.ɪˈhiː.li.ə/
近日点
the point in an object's orbit (= a curved path in space around a planet or star) around the sun at which the object is closest to the sun
In January the Earth reaches perihelion. 一月份地球到达近日点。
Opposite: aphelion