OK, so, in fact, what Kepler's second law says is that the acceleration is parallel to the position vector.
所以, 开普勒第二定律说, 加速度平行于位置矢量。

In later life Kepler seemed rather apologetic about his ability as an astrologer
开普勒在后半生似乎将才能用于占星而颇为抱歉。

Kepler was asking the wrong question.
开普勒 问错了问题。

Biographical sketch of astronomer Johannes Kepler
天文学家克普勒的自传概述

Famous astronomer Kepler defined this number as a precious treasury.
著名天文学家开普勒把这个数字定义为珍贵的财富。

Astronomy in the Era of Copernicus, Tycho, Kepler, and Galileo.
在哥白尼，第谷，克卜勒及伽略时代之天文学。

Then through Kepler's laws of motion, it's possible to calculate the mass of the star.
然后通过议案开普勒定律, 它可以计算出恒星的质量。

So, I want to tell you a bit about Kepler's second law of celestial mechanics.
因此我想告诉你们, 一些关于开普勒第二定律的知识。

After some treatment of centripetal force, he deduces Kepler's third law.
在向心力的一些论述之后，他推出了开普勒的第三定律。

Starts with Kepler three laws, and analyzes the conversational quantity in this kind of motion.
从开普勒三定律出发，分析这类运动中的守恒量。

The third law was discovered by Kepler, who was a contemporary of Galileo.
第三个定律是开普勒发现的，他是伽利略的同代人。

Mathematical Explanations and Modern Demonstrations about Kepler Law
开普勒定律的数学解释及现代证明

The new Derivation for Third Law of Kepler
开普勒第三定律表达式的一种新的推导方法

Ecuador, my friend Kepler, as you can see, they call him Juan.
厄瓜多尔，我朋友开普勒 你是知道的，他们叫他胡安。

Today, I will talk to you about elliptical orbits and Kepler's famous laws.
今天我们要讨论，行星轨道，和著名的开普勒定律。

The Kepler problem is solved by vector method and without the Binet equation.
直接利用矢量解法求解开普勒问题，不必借助于比奈方程。

The three laws of Kepler are stated and explained.
开普勒的三个法律说明和解释。

This is where the Kepler Space Telescope focused for many years.
开普勒太空望远镜在这里聚焦了很多年。

Study on the secondly kepler's law using a geometric method
利用几何方法研究开普勒第二定律

Line Profile of Relativistic Keplerian Rings in a Massive Halo of Neutrinos
大质量中微子晕内相对论性开普勒环的谱线轮廓