The distance between the Moon and the Sun constantly changes because both bodies are in orbit. There's no single fixed distance.

Here's how to think about it:

* Moon's Orbit: The Moon orbits the Earth.

* Earth's Orbit: The Earth orbits the Sun.

So, the Moon is always moving in relation to the Sun, sometimes closer, sometimes further away.

Here's how to calculate the approximate distance:

1. Earth-Sun Distance: The average distance between the Earth and the Sun is about 93 million miles (150 million kilometers).

2. Moon-Earth Distance: The average distance between the Moon and the Earth is about 238,900 miles (384,400 kilometers).

However, to get the precise distance between the Moon and the Sun at a specific moment, you'd need to:

* Know the current position of the Earth in its orbit around the Sun.

* Know the current position of the Moon in its orbit around the Earth.

* Calculate the vector sum of the Earth-Sun distance and the Moon-Earth distance.

There are online tools and astronomical software that can help you with these calculations.