MOON

DOES THE SIZE OF THE MOON CHANGE? People watched the moon , which scientists claimed , was the biggest in thirty years! It means the moon expands and contracts ? No . The image we see, depends on the distance from the viewer. A man looks small, if he is fr away. We see the sun and the moon , almost of the same size , but the actual size of the sun is thousands of ties bigger. So we have to assume that , during the course of its journey round the earth, the distance is changing. Normally all objects in the sky , have rotation as well as revolution. But the moon does not turn on its axis. So some people presume that it broke away from the earth. If we immerse it in Pacific ocean, we cannot see it! So we my infer that the earth (without water) was round and a piece of it broke away ; but how? Due to an explosion?