periapsis編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看periapsisperiapsis — 名詞名詞1. The point in an orbit closest to the body being orbited.1.名詞釋義近心點The point in an orbit closest to the body being orbited.例句The spacecraft will fire its engines at periapsis to change its orbit.