(adsbygoogle = window.adsbygoogle || []).push({}); 1. =The problem statement, all variables and given/known data

Kepler's law of planetary motion says that the square of the period of a planet (T^2) is proportional to the cube of the distance of the planet from the Sun (r^3). mars is about twice as far from the Sun as Venus. How does the period of Mars compare with the period of Venus?

2. Relevant equations

3. The attempt at a solution

Does this mean that the period of Mars is about twice as long as Venus'?

T^2=Kr^3

2T^2=K2r^3

???

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Proportion of planetary-period to the distance-from-the-sun

**Physics Forums | Science Articles, Homework Help, Discussion**