Question

As the moon is bettween you and the sun, you can't see it. it is called a

Answer 1

We have a “new Moon” when our Moon's orbit around Earth moves it between Earth and the Sun. From Earth, the Moon's surface looks dark because the illuminated side is facing away from Earth.

In French = Nous avons une « nouvelle Lune » lorsque l'orbite de notre Lune autour de la Terre la déplace entre la Terre et le Soleil. Vue de la Terre, la surface de la Lune semble sombre car la face éclairée est tournée vers la Terre.

Answer 2

Its called a solar eclipse. You marked this as a french question, so solar eclipse in french is éclipse solaire.