It has been established beyond all reasonable doubt that the Moon is not what it appears; that it is not just another satellite orbiting a planet, Earth, but an entity which has thrown the minds of some of the greatest thinkers and scientific brains into a quandary and bewilderment unprecedented in the history of astronomy. Why haven't you heard about this? Another government cover-up? How could Moon mysteries have anything to do with government secrecy, and moreover could it relate to the suppression of the space programme?
Let us outline some of the extraordinary anomalies and mysteries surrounding this puzzle. Clearly not all data will be equally reliable but the abundance of interrelated information nevertheless gives an overall picture which can be determined with some certainty. The first academic enigma must surely be that the Moon is apparently in its wrong orbit for its size. However, this would presumably be based on its assumed density. Technical reports claim a density of 3.3 for the Moon compared with 5.5 for Earth. Astronomy data indicates that the internal regions of the Moon are less dense than the outer, giving rise to the inevitable but outrageous speculation that it could be hollow. The eminent scientist Carl Sagan, a typical sceptic, made the statement, 'A natural satellite cannot be a hollow ob-ject'. But meaning here that if it is hollow, it is not a natural satellite---and therefore artificial.
More... http://www.redicecreations.com/specialreports/2006/01jan/moon.html