a catalogue of documented anomalies on planet Earth // maintained by the Aliens
> RECORD OBS-0863 | status: DEBUNKED | filed 2026-07-31
Home > Space > Hollow Moon

Hollow Moon

RecordOBS-0863
CategorySpace/Moon Landing
StatusDEBUNKED
SummaryThe Hollow Moon hypothesis proposes that Earth's Moon is either wholly hollow or contains a substantial interior space. A related variant, the Spaceship Moon hypothesis, suggests the Moon is an alien artifact. Scientific evidence from seismic experiments and other data indicates the Moon has a solid, differentiated interior.
OriginThe idea dates back to at least the 1970s, when Soviet authors proposed the Spaceship Moon variant. It has been popularized by conspiracy theorists like Jim Marrs and David Icke.
Claimed
  • The Moon is hollow or contains large interior spaces.
  • The Moon may be an artificial structure created by an alien civilization.
  • The Moon's lower density compared to Earth indicates it is hollow.
  • The Moon 'rang like a bell' during Apollo seismic experiments, suggesting it is hollow.
Evidence / consensusSeismic data from Apollo missions and other observations show the Moon has a solid crust, mantle, and core. The 'ringing' is explained by the Moon's dry, fractured crust, not hollowness. Density differences are due to the Moon's lack of a large iron core.
> OBSERVER NOTE:
A classic fringe theory that persists despite overwhelming seismic evidence. The 'bell' metaphor was misappropriated from a Popular Science article. No large voids exist.

Sources

  1. Hollow Moon - Wikipedia

Sources are external and provided for verification. Listing does not imply the Observer endorses their claims.