As the moon circles around the Earth, it alters phase in a consistent way. You can go through the child pages to understand this well.
We’ll try to explain why in fact the moon does that.
How come that the moon appears to shift its form nightly? The moon exists as world in space, just like Earth. Like it, it’s always one-half lighted by the sunlight. Putted differently, the circle orb of the moon has a “daytime side” and a “nighttime side.” From our earthly viewpoint, as the moon circles round the Earth, we see changing fractions of its round-the-clock sides. These are the shifting levels of the moon.
One way of realizing moon stages is to think about the location of the sun. Afterwards, it’s the sun that’s lighting up and making the daytime face of the moon. Moon stages are subordinate to the sun. They count on where the moon is with reference to the sun in space.
Different way to understand moon stages is to recall that, like the sun and all the satellites and stars, the moon comes in the east and circles in the west on a daily bases. It has to. The lifting and setting of all celestial targets is by the Earth’s uninterrupted spin below the sky.
At last, think about how the moon needs approximately a month to circle around Earth. Despite that the moon gets up in the east and sets in the west every day (referable Earth’s circle), it is as well progressing on the sky’s vault every day referred to its own movement in orbit round the Earth. The moon’s orbital rotation can be discovered ahead of the stars from one night to the following. It’s as if the moon is passing on the inside of a set of 360 degrees. Like that the moon motions about 12 degrees daily.
The moon’s orbital rotation is to the east. Every day, as the moon motions some other 12 degrees to the east on the sky’s vault, Earth has to go around a bit longer getting you around to wherever the moon is. Therefore the moon gets up, on generally, about 50 minutes later day by day.