Christopher Wren打赌如果有人能用平方反比定律推论开普勒定律,他就会将一本价值40先令的书送给这个人。
He would give a book worth 40 shillings to anyone who could deduce Kepler's laws from the inverse-square law.
今天我们要讨论,行星轨道,和著名的开普勒定律。
Today, I will talk to you about elliptical orbits and Kepler's famous laws.
然后通过议案开普勒定律,它可以计算出恒星的质量。
Then through Kepler's laws of motion, it's possible to calculate the mass of the star.
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