00:00The moon is the furthest cosmic body human feet have ever stepped foot on, but despite
00:08having been there and brought back samples, it still holds a lot of mysteries.
00:12Now more than 50 years since humans last set foot on the lunar surface, experts say they
00:16might finally know what's going on inside our planet's largest natural satellite.
00:20According to astronomers at the French National Centre for Scientific Research, at the centre
00:24of the moon is a big ball of iron.
00:26This was deduced via both evidence from a seismic monitoring device that is currently
00:30on the moon placed there by the Apollo missions and also by newer data collected from lunar
00:34laser ranging, all of which provides information about the moon's density, gravitational interaction
00:39with our planet, and its variable distance.
00:42They say this all points to a global mantle overturn scenario, where dense elements within
00:46the moon's mantle drift towards its core, meanwhile lesser dense materials in the core
00:50drift upwards, meaning the insides of the moon are remarkably like the core of the Earth.
00:54However, given the moon's much smaller size, its core is much smaller as well.
00:58The research team says the moon's outer core is only 450 miles across, with an inner
01:02core of just 320 miles, which Science Alert reports is only 15% of the moon's radius.
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