The spaceship of aliens

There are some scientists that suppose the presence of the intellect on the Moon. When the American astronauts visited the Moon they didn't find there the Moon inhabitants. However after the famous step of Armstrong on the surface of the Moon, the earth's satellite presented even more mysteries.
Before landing the Moon, the fuel capacities were thrown on the surface of the Moon. Soon after the apparatus that was in these capacities started to transmit special data to the earth that said about the vibration of the Moon crust causing the local quake. Many scientists supposed that the Moon has the metallic shell that covers the centre of the Moon.
One of scientists thinks that there may be the space in the centre of the Moon that is made to give service to spaceships of aliens as well as to provide them with fuel. It must also have some special mechanisms to watch earth.
According to numerous analysis of the shell of the Moon scientists made the conclusion that its structure and the metals of which it consists are perfect for protection. And the fact that can be said for sure is that this shell couldn't be made by nature.
The constant signal was also noticed. It was transmitted every 30 minutes and lasted one minute. Astronauts also noticed the gas that appeared from the surface of the Moon and disappeared very quickly. According to theories this could be the product of fuel burning of the ship that we call "the Moon".