How do I find the distance to the moon using Kepler's and Newtons Laws? Do I use kepler's law to find the average radius in terms of GM and then plug in to g=GM/r^2 where g=gravitational constant on earth? I just cant get close to the right distance, fuck.

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Anonymous Wed Sep 29 02:42:25 2010 No.1819962 [Reply] [Original]

How do I find the distance to the moon using Kepler's and Newtons Laws?

Do I use kepler's law to find the average radius in terms of GM and then plug in to g=GM/r^2 where g=gravitational constant on earth?

I just cant get close to the right distance, fuck.

>>	Anonymous Wed Sep 29 02:44:25 2010 No.1819964 kepler's third law I mean

Anonymous Wed Sep 29 02:52:25 2010 No.1819986

>>1819962
No. It doesn't work like that.

To solve for r using kepler's third law you must know the orbital period of the satellite:

>>The square of the orbital period of a satellite is directly proportional to the cube of the semi-major axis of its orbit.

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