perihelion造句

1、The Q is - do you mean Pluto in its aphelion or perihelion ?
我的问题是，冥王星此时是在近地点还是远地点？

2、A comet is at perihelion when it is closest (=very close) to the sun.
彗星最接近太阳时，它就是在近日点。

3、A comet is at perihelion when it is closest (=very close) to the sun
彗星最接近太阳时，它就是在近日点。