Question

Question

Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses

The orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.

The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.

The cube of orbital period is proportional to the square of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.

The square of orbital period is proportional to the semi-major axis.

Answer 1

Kepler's third law of orbital motion states that the square of the orbital period (T) of a planet is proportional to the cube of the semi-major axis (a) of its orbit. Therefore, the correct statement is:

The square of orbital period is proportional to the cube of the semi-major axis.