Between 1969 and 1972, Apollo astronauts placed seismometers at their landing sites around the moon. NASA then used the spent spacecraft for science, directing these modules for controlled crashes into the Moon. These crashes caused moon-quakes. Scientists measured the vibrations moving through the Moon and found that it "rings like a bell".

Apollo 12 sent their spent lunar module back to the Moon. It impacted about 40 miles away from the Apollo 12 landing site with the force of one ton of TNT. The resulting shockwave built up and peaked in just eight minutes. Then it took an hour to fully dissipate.

Apollo 13 blasted their S-IVB module at the Moon 85 miles from Apollo 12’s ALSEP — It hit with the force of 11 and a half tons of TNT. The seismic impact peaked after seven minute with shockwaves 30 times greater and four times longer than those from Apollo 12’s lunar module impact. That's over 3 hours!! Let me say that again... The Moon rang like a bell for over 3 hours!! Have you ever heard of an earthquake lasting 3 hours??? It has been theorized that this can only occur if the Moon is hollow.

FACT: Hollow structures do not form naturally in outer space.

44 Years Later... Why No Return Missions?

Only 6 Apollo missions landed on the moon (11, 12, 14, 15, 16, 17). Only 12 people have ever walked on the moon (1969 - 1972). After Apollo 17, the Apollo missions ended abruptly. Apollo missions 18, 19, 20 were cancelled. For the past 44 years, no one has walked on the moon. Did Nasa find something on the Moon that caused a 44 year moratorium on manned deep space missions?

Sincerely,

Michael Matthews
^{Follow me on Twitter}