- 1. n. That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion. Source: opted
- 2. n. apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun Source: wordnet
- 3. That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion. Source: webster
- 4. That point of a planet's or comet's orbit which is most distantfrom the sun, the opposite point being the perihelion. Source: adambom
- 5. n:100 n. apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun Source: ecdict
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aphelion
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