There isn't a single average distance between the Sun and Mars because the planet's orbit is elliptical, not circular. Here's why:

* Mars' Elliptical Orbit: Mars travels in an oval-shaped orbit around the Sun. This means its distance from the Sun constantly changes.

* Perihelion and Aphelion:

* At perihelion, Mars is closest to the Sun (approximately 206.6 million kilometers or 128.4 million miles).

* At aphelion, Mars is furthest from the Sun (approximately 249.2 million kilometers or 154.6 million miles).

So, how do we find an average?

There are two ways to calculate an average distance:

1. Average of Perihelion and Aphelion: Add the perihelion and aphelion distances and divide by two. This gives you a rough average of around 227.9 million kilometers (141.5 million miles).

2. Semi-major Axis: This is the average distance from the Sun to Mars, calculated as the half of the major axis of its elliptical orbit. This is a more accurate representation of the average distance and is approximately 228 million kilometers (141.6 million miles).

Therefore, the average distance between the Sun and Mars is approximately 228 million kilometers or 141.6 million miles.