Yes, the square of a planet's orbital period is proportional to the cube of its average distance from the Sun. This is known as Kepler's Third Law of Planetary Motion.

Here's a breakdown:

* Orbital Period: The time it takes a planet to complete one full orbit around the Sun.

* Average Distance from the Sun: This is the average of the planet's closest and farthest distances from the Sun, also known as the semi-major axis of its elliptical orbit.

Mathematically:

T² ∝ r³

Where:

* T = Orbital period

* r = Average distance from the Sun

In simpler terms:

If you double the average distance of a planet from the Sun, its orbital period will increase by a factor of about 2.83 (the cube root of 8).

This law applies to all planets in our solar system, and it helps us understand the relationship between a planet's distance from the Sun and how long it takes to complete an orbit.