Scientists believe a tenth planet may exist beyond Pluto.
Some scientists think so.
According to space researcher Dr. John Matese, there may be a large and mysterious object circling the sun about TK light-years beyond Pluto. Matese noticed iceberg-like lumps of rock known as comets orbiting past Pluto that were moving in an unusual direction. If a comet passes by a large object, the object s gravity can tug the comet out of orbit. Dr. Matese thinks a large, undiscovered planet may be the cause of the comets bumpy ride.