Question

which statement describes keplers third law of orbital motion? (1 point) the cube of 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 semi - major axis. the orbital period is proportional to the square of the semi - major axis.

Explanation:

Kepler's third law states that for a planet orbiting the Sun (or any two - body system in orbit), the square of the orbital period ($T$) of a planet is proportional to the cube of the semi - major axis ($a$) of its orbit, expressed as $T^{2}\propto a^{3}$.

Answer:

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