This question is a little tricky because it depends on what you mean by "in front of." Here's a breakdown:

* From Earth's perspective: The Sun and Moon appear to move across the sky, but it's actually Earth rotating. During a solar eclipse, the Moon passes in front of the Sun from our viewpoint.

* In space: The Moon orbits the Earth, and Earth orbits the Sun. The Moon is always closer to Earth than the Sun, so it can never truly be "behind" the Sun.

To summarize:

* During a solar eclipse, the Moon appears to go in front of the Sun from our perspective on Earth.

* In reality, the Moon is always between Earth and the Sun, but it's much closer to Earth.