There is a gray moon behind WeChat friends.

There are many interesting functions in WeChat personal information settings, and you agree that you can emulate your friends, not only the grey moon but also many cartoon characters.

The moon is the only natural satellite of the earth, which may have been formed about 4.5 billion years ago. Shortly after the formation of the earth, there were several hypotheses about its origin. There is more factual evidence to support the view that it is the "origin theory of big collision" formed by the debris generated by the huge collision between the earth and the Martian-sized celestial body "Teia" gathered around the earth.