Eclipses can only occur during a [[full moon]], since the geometry of the situation requires that the earth be directly between the sun and moon — meaning that before and after the eclipse, the face of the moon we see is fully illuminated. | Eclipses can only occur during a [[full moon]], since the geometry of the situation requires that the earth be directly between the sun and moon — meaning that before and after the eclipse, the face of the moon we see is fully illuminated. |