Question

which of these describes keplers third law of orbital motion? (1 point)
o t ∝ a²
o t² ∝ a³
o t³ ∝ a²
o t² ∝ a

Explanation:

Kepler's third law states that the square of the orbital period ($T$) of a planet is directly proportional to the cube of the semi - major axis ($a$) of its orbit.

Answer:

$T^{2}\propto a^{3}$