advance of the perigee

例句：

1. 1.The planet's perigee is at its closest point to the sun.
   这颗行星的近日点是它离太阳最近的点。
2. 2.The spacecraft will fly past the planet's perigee before returning to Earth.
   航天器将在飞越行星的近日点后返回地球。
3. 3. The celestial body's perigee is calculated using Kepler's laws.
   用开普勒定律计算天体的近日点。