What is the truth behind the studies of the Moon being hollow?  Or at least the common beliefs.

I’m sorry to report ha there is no scientific evidence in support of a hollow moon.  This myth was originated by HG Wells’ 1901 book “The First Men in the Moon” and was perpetuated by subsequent literary works such as Edgar Rice Burroughs’ mid 1920′s books “The Moon Maid” and “The Moon Men” in which the Moon is hollow, supports an interior breathable atmosphere and is inhabited by a race of “moon men”.  Unfortunately, ideas such as these found in fictional works of literature frequently make their way into the mainstream public eyes and are mistaken for scientific fact.

Some people may argue that the Moon’s lower overall density (~60% that of the Earth’s average density) and seismic ringing from a jettisoned portion of the Apollo 12 lunar lander indicate a hollow moon.  However, the giant impact which formed the Moon stripped off the low-density upper crust of the Earth and is likely the cause pf the low density.  Addition seismic studies as well as moment of inertia calculations and gravity studies all reveal that the Moon has an interior similar to that of the Earth” (from out to in) crust, upper mantle, inner mantle, molten outer core and crystallized solid inner core. For additional “light: reading, check out these scientific papers: Nakamura et al., (1973) “New Seismic Data on the Sate of the Deep Lunar Interior” Science. 181 (4094): pp. 49-51 and Konopliv et al., (1998) “Improved Gravity Field of the Moon by Lunar Prospector” Science, 281 (5382): pp 1476-1480.

Brad Bailey

NLSI Staff Scientist

February 2, 2009

SSERVI Science Teams

  • New rock type on the lunar farside found by NLSI Team at Brown/MIT


    The farside of the Moon has always been a mystery and is only accessible by spacecraft. New compositional information from the Moon Mineralogy Mapper (M3) onboard Chandrayaan‐1 has identified a suite of highly unusual rock types exposed at small areas within the farside Moscoviense Basin. M3 is a state‐of‐the art visible and near‐infrared imaging spectrometer that was a guest instrument on Chandrayaan‐1, the Indian Space Research Organization’s (ISRO) first mission to the Moon. The instrument is designed to measure accurately the diagnostic mineral absorption bands of solar radiation reflected from the lunar surface.

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NLSI Inspiration Room

Did you know?

The lunar day (or the time from sunrise to sunrise) on the moon is approximately 708 hours.

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