aphelion
0 synonyms and 0 antonyms for aphelion, grouped by meaning and by how common each one is.
Noun — The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.
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Etymology
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 (“a...
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