开普勒第二定律

因此我想告诉你们，一些关于开普勒第二定律的知识。

So , I want to tell you a bit about Kepler 's second law of celestial mechanics .

，开普勒第二定律-，奇怪他是怎么发现的，惊世的成就。

- Kepler 's second law is & quite bizarre how he found that out , an amazing accomplishment .

利用几何方法研究开普勒第二定律

Study on the secondly kepler 's law using a geometric method

开普勒第二定律当然也对，如果东西远离了。

But , Kepler 's law would also be true , actually , if things were going away .

如何用向量来解释开普勒第二定律？

So , let 's try to see , what does Kepler 's law say in terms of vectors ?

所以，开普勒第二定律说，加速度平行于位置矢量。

OK , so , in fact , what Kepler 's second law says is that the acceleration is parallel to the position vector .

开普勒第二定律说到，首先每个行星的运动都保持在同一平面内。

So , what Kepler 's second law says is that the motion of planets is , first of all , they move in a plane .

其实有三个定律，让我先来告诉你们开普勒第二定律，其中对向量有一个很好的解释。

So , there 's actually three laws , but let me just tell you about the second one that has a very nice vector interpretation .

利用几何方法及计算机模拟研究开普勒第二定律，运算结果面积速度近似为常量，本文中精度为10-13。

Using a geometric method and computer simulation , the second Kepler 's Law is studied . The calculated result shows that the areal velocity is approximately constant with an accuracy of 10 - 13 .

事实上，如果你观察带电粒子，在点电荷引起的电场中的运动，它也满足开普勒第二定律。

So , actually , if you look at motion of charged particles in an electric field caused by a point charged particle , it also satisfies Kepler 's law , satisfies the same law .