Description: 遠日點是繞太陽公轉軌道上距太陽最遠的點。繞太陽運行且不受任何其他天體影響的天體，其軌道呈橢圓形，太陽位於該橢圓的焦點之一。在數學上，遠日點標誌著橢圓主軸的一端。在這個詞中，”ap“表示最遠點，”heliion“表示太陽。因此，只有當中心天體是太陽時纔可以使用該術語。當中心天體是一顆非太陽恆星時，該術語為"apastron"或"apoastron"；當繞行的中心天體是地球時，該術語為"apogee"。無論中心體是什麼，一般的術語都是”apoapsis”。

Related Terms:

• Ellipse
• 軌道
• Perihelion
• Solar System

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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