Mars is located 1.5 AU from the sun.What is its orbital period?
A) 1.3 years
B) 3.4 years
C) 1.8 years
D) 2.25 years
E) 11.4 years

Question

Quizplus · Accepted Answer

Kepler's third law states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit. Mars is located 1.5 AU from the sun, so its orbital period is 1.5^3 = 3.375 years, which is closest to 3.4 years.

Mars Is Located 1