Synonyms
Antonyms
1. aphelion
noun. apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun.
Synonyms
- apoapsis
Antonyms
- perihelion
- point of periapsis
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Example sentences of the word aphelion
1. Noun, singular or mass
At aphelion, it is well outside the orbit of Pluto, and at perihelion, it is just 0.6 AU from the sun.