The phase of the moon that is seen when the moon is located between Earth and the sun is a new moon.
The phase of the moon that is seen when the moon is located between Earth and the sun is called the new moon. To determine this, you can visualize the position of the moon relative to the Earth and the sun. During a new moon, the side of the moon that faces the Earth is in shadow because the sunlight is fully blocked by the moon. This makes the moon appear dark, as if it has disappeared from the sky, hence the name "new moon".
