aphelion

English

Etymology

Greek form of Latin aphelium, from Ancient Greek ἀπό (apó, “from”) + ἥλιος (hḗlios, “sun”) (modelled after apogaeum). Compare perihelion.

Pronunciation
  • IPA(key): /əˈfiːlɪən/, /æpˈhiːlɪən/

Noun

aphelion (plural aphelia)

  1. (astronomy) The point in the elliptical orbit of a planet, comet, etc., where it is farthest from the Sun.

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