Why do we see each moon phase only about once a month? Choose 1 answer: (A) It takes about 27 days for the moon to rotate on its axis once. (B) It takes about 27 days for the moon to orbit Earth (C) It takes about 27 days for the moon to orbit the sun once.

The moon phases occur in a cycle that takes approximately 29.5 days, which is known as a synodic month. This period accounts for the changing position of both the moon and the Earth in relation to the sun, as the moon's orbit around Earth and Earth’s orbit around the sun are both at play. During this time, we see the moon go through its various phases from new moon to full moon and back again. Interestingly, the moon is in synchronous rotation with Earth, meaning it rotates on its axis in the same amount of time it takes to complete its orbit. This is why we always see the same side of the moon! It’s like the moon waltzes around us, gracefully showing off its shining face while keeping its back turned - how romantic!