Could it really be that sensors placed on the Moon by Apollo astronauts in 1971 only just revealed this information about the structure of the Moon, or has NASA been holding information back? The Daily Mail reports:
It’s an unlikely marriage between state-of-the-art and 40-year-old technology that has yielded extraordinary results.
Signals from seismic sensors left on the lunar surface by Apollo astronauts in 1971 have revealed that the Moon has a liquid core similar to Earth’s.
Scientists at Nasa applied contemporary seismological techniques to the data being emitted from sensors placed by their colleagues during the U.S. space program’s heyday.
The new research suggests the Moon possesses a solid, iron-rich inner core with a radius of nearly 150 miles and a fluid, primarily liquid-iron outer core with a radius of roughly 205 miles.
Where it differs from Earth is a partially molten boundary layer around the core estimated to have a radius of nearly 300 miles…
[continues in the Daily Mail]