Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.

the perihelion

peri- = [Greek] around; Helios = [Greek] Sun

The perihelion is the point in an orbit around the Sun that is closest to the Sun. The opposite point is called aphelion. The more general word is perifocus.