The leading theory claims that the Moon formed out of the wreckage created when a Mars-sized planet called Theia collided with the young Earth 4.5 billion years ago.
![Avatar](https://cdn.statically.io/img/i.pinimg.com/140x140_RS/13/b6/f2/13b6f27638465717a974b5e838ef9f96.jpg)
Joyce Morse