apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun
aphelion的用法和样例:
例句
用作名词 (n.)
Otherwise difficult to notice, the change in the Sun's apparent diameter between Perihelion and Aphelion is clear. 我们很难用肉眼看出近日点和远日点太阳视直径的变化,但在这张图上显而易见。