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:

• 橢圓
• 軌道
• 近日點
• 太陽系

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

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".