單詞
aphelion
英 [?p'hi?l??n]
美[?'fil??n]
基本信息
- n. 遠日點
詞態變化
復數:?aphelia;
英文詞源
- aphelion (n.)
- "point farthest from the sun" (of a celestial body's orbit), 1670s, a Grecianized form of Modern Latin aphelium, altered by Johannes Kepler based on Greek apo heliou "away from the sun," from apo "away from" (see apo-) + heliou, genitive of helios "sun" (see sol). The whole was formed on the model of Ptolemaic apogaeum (see apogee) to reflect the new helio-centric model of the universe.
aphelion相關單詞