UFOlogists have proposed that the moon, believed to be a natural satellite of Earth, is, in fact, a huge spaceship, a gigantic UFO, parked in orbit around the Earth by an advanced technological civilization.
The proposal that the moon is an artificial satellite of Earth, specifically an alien spaceship, a massive UFO, parked in orbit around the Earth, is known as the Spaceship Moon Theory, Artificial Moon Theory, or Alien Moon Theory.
According to proponents of the Spaceship Moon Theory in the UFO community, there is evidence to suggest that the moon was built by an alien civilization with science and technology much more developed than ours.
The Spaceship Moon Theory claims that the moon, as an alien UFO parked in orbit around the Earth, has a hollow inside. In other words, the moon is a hollowed-out artificial structure containing an underground base serving also as the interior of a gigantic UFO spaceship.
The startling hypothesis was first proposed in 1970 by two Russian scientists, members of the Soviet Academy of Science, Michael Vasin and Alexander Shcherbakov, in an article, “Is the Moon the Creation of Alien Intelligence?”
Vasin and Shcherbakov suggested that the moon was a natural space body converted into an artificial structure by alien engineers who melted the original solid core, deposited the molten lava on the lunar surface, and created an inner lunar space protected by an artificial shell below the outer shell we know as the lunar surface.
The alien race then placed their gigantic UFO in orbit around the Earth for reasons we can only speculate about.