aphelion 

  1. 名詞
遠日點

    
                        
    2. 
                                            

                

            

            
            

                

                
例句

                

                    
    
                                                    
  1. 
                                At aphelion ; at perihelion, .                            
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  2. 
                                The perihelion and aphelion are points on the orbit.                            
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  3. 
                                Its aphelion is only half that of Sedna's, at 400–500 AU.                            
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  4. 
                                On February 18, 2005, "Hayabusa" passed aphelion at 1.7 AU.                            
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                                Aphelion of the initial comet orbit lies near the orbit of Jupiter.                            
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