This time a new planet has been found close t o home. By the use of computers, astronomers believe another planet the size of Neptune lies beyond Pluto.
Researchers Are Pretty Sure They've Found A New Planet In Our Solar System Konstantin Batygin and Mike Brown, two CalTech scientists, say the new planet is about 10 times the mass of Earth and has an atmosphere of hydrogen and helium. Science magazine reports that the mysterious "Planet X" moves in a distant orbit beyond Neptune
