apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun
造句
用作名詞(n.)
Otherwise difficult to notice, the change in the Sun\\\'s apparent diameter between Perihelion and Aphelion is clear. 我們很難用肉眼看出近日點和遠日點太陽視直徑的變化，但在這張圖上顯而易見。