Mars's distance from the Sun varies because its orbit is not a perfect circle, but an ellipse.

Here's how to think about it:

* Average Distance: Mars is about 228 million kilometers from the Sun on average.

* Perihelion (Closest): At its closest point (perihelion), Mars is around 206.6 million kilometers from the Sun.

* Aphelion (Furthest): At its furthest point (aphelion), Mars is about 249.2 million kilometers from the Sun.

So, depending on where Mars is in its orbit, the distance to the Sun can vary significantly.