The distance between the Sun and Earth is not constant because Earth's orbit is elliptical.

Here are some ways to express the distance:

* Average distance: 93 million miles (150 million kilometers)

* Astronomical Unit (AU): 1 AU (this is defined as the average distance between the Sun and Earth)

* Light-years: About 8.3 light-minutes (the time it takes light from the Sun to reach Earth)

So, depending on where Earth is in its orbit, the distance can vary slightly.