Formed at least 4.5 billion years ago, about the same time as the earth, the moon is our closest celestial neighbor.
The moon, like Earth, is shaped like an egg, and the moon is about 33% smaller than the earth.
The moon is a natural timekeeper with her cycle taking approximately 28 days to orbit the earth.
During this cycle, the moon moves through 8 phases of a few days each.
The sunlight the moon reflects back to Earth is a result of the moon’s position in relation to the sun.