Why does the moon sometimes seen full moon and half?

The appearance of the moon changes depending on its position in relation to the Earth and the Sun. When the moon is directly opposite the Sun in the sky, we see a full moon because the entire side of the moon facing the Earth is illuminated by the Sun.

When the moon is at a different angle in relation to the Earth and the Sun, we see only a portion of the illuminated side of the moon, resulting in a crescent or half moon. This is because the amount of sunlight reflecting off the moon that is visible from Earth changes as the moon orbits around the Earth.

The Moon appears to go through phases because of its position relative to the Earth and the Sun. As the Moon orbits the Earth, the amount of sunlight that reflects off the Moon's surface that is visible from Earth changes. This results in the different phases of the Moon, including the full moon and the half moon.

When the Moon is between the Earth and the Sun, the side of the Moon facing the Earth is fully illuminated by the Sun. This is known as a full moon. As the Moon orbits the Earth, it moves away from the Sun and the amount of sunlight that reflects off the Moon's surface that is visible from Earth decreases. This results in the Moon appearing to go through a series of phases, including the half moon.

The half moon occurs when the Moon is at a 90-degree angle to the Earth and the Sun. From Earth, we can see half of the Moon's illuminated surface. As the Moon continues to orbit the Earth, the amount of sunlight that reflects off the Moon's surface that is visible from Earth increases, and the Moon appears to go through a series of phases, including the full moon again.