Ceres is outside the solar system.
Ceres -LRB- -LSB- ˈsɪəriːz -RSB- minor-planet designation : 1 Ceres -RRB- is the largest object in the asteroid belt that lies between the orbits of Mars and Jupiter.
The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter.
