* Darkness: The absence of sunlight allows the reflected light from the moon to be more visible. During the day, the sun's light overwhelms the moon's reflected light.
* Position: The moon's position in the sky changes throughout the month. Sometimes it's higher in the sky and closer to the horizon, and sometimes it's lower and further away. The angle of the sun's light reflecting off the moon's surface can change how bright it appears.
* Phases: The moon goes through phases, which are caused by the changing angle at which we see the sunlit portion of the moon. A full moon appears brighter because we see the entire illuminated side.
In short, the moon appears brighter at night because we can see the sunlight reflected from its surface more easily when the sun is not in the sky.
