moonphase

Example:Opposite to the bright moonphase, a dark night is when the moon is not visible or is covered by clouds.

Definition:The time between sunset and sunrise, when the sky is dark and the moon is the primary light source.

Example:The concept of darkness is the opposite of moonphases, especially during a new moon phase.

Definition:The absence of light, which is the condition when the moon is not illuminated by the sun.