Hollow Moon
Speculation that Moon is hollow / From Wikipedia, the free encyclopedia
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The Hollow Moon and the closely related Spaceship Moon are pseudoscientific hypotheses that propose that Earth's Moon is either wholly hollow or otherwise contains a substantial interior space. No scientific evidence exists to support the idea; seismic observations and other data collected since spacecraft began to orbit or land on the Moon indicate that it has a thin crust, extensive mantle and small, dense core. Overall it is much less dense than Earth.
The concept of a (partially) hollow Moon has been employed in science fiction multiple times, starting with H. G. Wells' 1901 novel The First Men in the Moon.'[1][2] I
The Hollow Moon hypothesis often says the moon is hollow as a product of an alien civilization.[1][3] It is often called the Spaceship Moon hypothesis[1][3] and often corresponds with beliefs in UFOs or ancient astronauts.[3] In 1970, two Soviet authors published a short piece in the popular press speculating that the Moon might be "the Creation of Alien Intelligence". Since the late 1970s, the hypothesis has been endorsed by conspiracy theorists like Jim Marrs and David Icke.[4][5]
When H. G. Wells wrote his 1901 book The First Men in the Moon the concept of hollow planets was not new. The first discussion of a Hollow Earth was by scientist Edmond Halley in 1692.[6][7] Wells borrowed from earlier fictional works that described a hollow Earth, such as the 1741 novel Niels Klim's Underground Travels by Ludvig Holberg.[8] Both Hollow Moon and Hollow Earth are now considered to be fringe theories or conspiracy theories.[1]