The second smallest
planet Mercury in the Solar system following Pluto (no more Pluto creature a
planet, Mercury become smaller) and also the least thick of the four rocky
worlds close to the Sun are grouped in the classification of the planets land
called by its composition. It follows through respect by Mariner 10, NASA; the center
of Mercury was melted by the lava that flowed to the surface, in addition,
Mariner found a weak magnetic field. To the knowledge acquired, it is believed
that the magnetic fields remain even if the interior part is melted.
