According to an article published in the journal
Science, Mercury appears to be less mountainous than the Moon and Mars and
the bowels of the planet from the Sun, with deep reserves of iron sulfide, are
very different from the others in our system. The publication includes two studies
from the information sent by the spacecraft "Messenger" a year ago
became the first artificial satellite of Mercury and has been making
observations of the topography and gravitational field in the northern
hemisphere .
