The favoured official scientific explanation is that the Moon broke off from the Earth’s crust after it was struck by a massive Mars-sized object, and then remained in our orbit.
Many pseudo-scientists and conspiracy theorists have latched onto claims that the moon’s existence and relationship with Earth defies physics, to brand it an artificially-created object.
They have taken the giant leap from this to claim aliens from billions of years ago created the structure and it may even be occupied inside, in a similar way to the infamous Death Star from the Star Wars movies.
The latest supporter of the conspiracy theory has devoted an entire article to the claims on his website.
UFO researcher JP Robinson says the fact that the moon “rings like a bell or gong when struck” means it must be hollow and artificially constructed, despite being coated in rock.
Mr Robinson wrote: “It appears that the moon itself shouldn’t actually be where it is, and all the data regarding the moon’s size and its distance from the sun and from the Earth, have confounded scientists and researchers alike.”
It is true that scientists have been divided on how the moon formed, with some suggesting its existence defies physics itself.
Many scientists agree the size of the Moon is one of our solar system’s biggest anomalies.
Physics has been unable to explain why a planet the size of Earth has a Moon of such a large size in comparison.
Our Moon would be expected to be about 40 miles in diameter, but is closer to 2,000 miles.
Other supporters of the hollow moon theory include conspiracy theory king David Icke and Scott C Waring, editor of ufosightingsdaily.com.
Mr Robinson added: “The Moon revolves at exactly one hundredth of the speed that the Earth turns on its axis.
“It is also precisely 400 times smaller than the Sun and exactly 400 times closer to the Earth.
“Patterns and number sequences are consistent when looking at all of the Moon’s major aspects, contrary to the inconsistencies of all other planets and moons in our solar system.
“If you divide the circumference of the Sun by that of the Moon and multiply by 100 you get the polar circumference of the Earth.
“In fact, so precise are the measurements and correlations between the Earth, Sun and Moon that any differentiation in the figures would inevitably lead to vastly visible changes. “Take the solar eclipse for example; the Sun would no longer be able to conceal itself so perfectly behind the Moon.
“That astoundingly perfect fit that we take for granted would cease to be.”
It was also confirmed by NASA that the moon does ring like a bell when struck.
During Apollo 12 the shock waves made by the lunar module ascent were recorded by seismic equipment and showed that “Moonquake” tremors lasted for 55 minutes.
Vibrations caused by the impact of Apollo 13’s Saturn rocket booster, which was equivalent to 11 tons of TNT going off, left the Moon shaking for three hours and 20 minutes, the same equipment showed.
Mr Robinson added: “There are many theories doing the rounds regarding the enigmatic nature of Earth’s Moon.
“Many claim that the moon is an artificial satellite rather than a natural object.
“It is hollow, which should be impossible were it a natural planetary object.
“As noted astronomer Dr Carl Sagan wrote in 1966, ‘A natural satellite cannot be a hollow object’.
“So, if the Moon is a hollow artificial construct as the facts lead us to understand, who built the Moon, how did they get it into its present orbit and why did they put it there? “How is it that our moon remains stationary in Earth’s orbit, never revealing the dark side to us?
“Such questions will certainly not be answered overnight but the initial realisation that our Moon is not a natural object behaving naturally would raise a few eyebrows were it common public knowledge.”