So the moon does have night and day, but a night/day cycle is one lunar month long. However, this doesn't answer your question of why the sky is always dark when viewed from the moon - even when the sun is above the horizon. read more
The sky appears black because there is no atmosphere at the moon. The sunlight cannot be scattered due to the absence of atmosphere. Hence, no blue light reaches the eye of the observer. So, the sky appears black from the moon. read more
So the moon does have night and day, but a night/day cycle is one lunar month long. However, this doesn't answer your question of why the sky is always dark when viewed from the moon - even when the sun is above the horizon. read more
The Moon (unlike the Sun) is not bright enough to illuminate the air and dust in the night sky. On average, the surface of the Moon only reflects about 12%. The size of the full Moon in the night sky is only 1/2 of a degree. There are 180 degrees from horizon to horizon, so it is far too small to cast much light. read more