16. Which form of Kepler’s third law can you use to relate the period T and radius r of a planet in our solar system as long as the unit year is used for the period and astronomical unit is used for the radius? ( = means proportional to in this case)

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1 point
T^2=r
T=r^2
T^2=r^3
T^3=r^2

1 answer

The correct form of Kepler's third law that can be used to relate the period T and radius r of a planet in our solar system, using the unit year for the period and astronomical unit for the radius, is:

T^2 = r^3