## Elliptical Orbit

1. The problem statement, all variables and given/known data
The period of a comet orbit is 100 years. As its closests approach is 0.37 AU from the sun. What is the semi-major axis of the comet's orbit? How far does it get from the sun?

2. Relevant equations

(T1/T2)^2 = (s1/s2)^3

3. The attempt at a solution
I dont even know where to begin with this problem any help would be really appreciated.
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Hi myoplex,

 Quote by myoplex11 1. The problem statement, all variables and given/known data The period of a comet orbit is 100 years. As its closests approach is 0.37 AU from the sun. What is the semi-major axis of the comet's orbit? How far does it get from the sun? 2. Relevant equations (T1/T2)^2 = (s1/s2)^3 3. The attempt at a solution I dont even know where to begin with this problem any help would be really appreciated.
What does Kepler's laws have to say about periods and semi-major axis?