I believe it is the outer crust but i will do more reaserch for you :)
<span>Planets
orbit in the same plane but not in the same direction.</span>
The orbits of all the planets in the solar system are coplanar. This is because
the planets are formed from a disk of dust that was found on the solar system
plane, and so all the planets are found on the same plane. However, six of the
planets orbit in the same direction with the exception of Uranus and Venus.
They came because of Rinderpest. Before coming to South America, Africans in Africa depended on cattle such as cows to thrive. But Rinderpest brought to Africa by foriegners began to spread, and the cattle started to suffered from fevers, inflammation in the brain and dysentery. They also had major problems with Europeans and their industries. So they decided to settle in South America.
Hope this helps :)