The distance to the Sun is not constant because Earth orbits the Sun in an elliptical path. Here's a breakdown:

* Average distance: 93 million miles (150 million kilometers), this is also called an Astronomical Unit (AU).

* Closest point (perihelion): 91.4 million miles (147.1 million kilometers)

* Farthest point (aphelion): 94.5 million miles (152.1 million kilometers)

So, depending on where Earth is in its orbit, the distance to the Sun can vary by a few million miles.