aphelion

名词 n.
中文释义
英 /əˈfiː.lɪ.ən/|/æpˈhiː.lɪ.ən/    美 /əˈfi.li.ən/|/əˈfil.jən/|/æpˈhi.li.ən/|/æpˈhil.jən/

英文释义

名词 n.
  1. The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun. also,figuratively
    — [I]t follows from the theory of gravity, that the aphelia of Mercury, Venus, the Earth, and Mars, slightly progress.

词形变化

aphelia plural aphelions plural,proscribed

词源

From New Latin aphēlium (whence English aphelium, now displaced) + -ion (used in the names of other apsides). Aphelium was formed from Ancient Greek ἀπο- (apo-, prefix meaning ‘away, from, off’) + ἥλῐος (hḗlĭos, “the sun”) (ultimately from Proto-Indo-European *sóh₂wl̥ (“the sun”)), modelled after New Latin apogaeum (“apogee”).
The plural form aphelia is from aphelion + -a (plural form of the suffix -on).
0 次浏览 数据来源: Wiktionary