Paschen curve

例句：

1. 1.The Paschal curve is a mathematical concept that describes the shape of the Earth's orbit around the Sun.
   帕什恩曲线是描述地球围绕太阳运行的轨道形状的一种数学概念。
2. 2. In this study, we used the Paschal curve to calculate the distance between two points on thecelestial sphere.
   在这项研究中，我们使用帕什恩曲线来计算天球上两点之间的距离。
3. 3. The Paschal curve is also known as the ecliptic, and it represents the plane of the celestial sphere.
   帕什恩曲线也被称为黄道面，它代表了天球的平面。