Today, planetary scientists, Konstantin Batygin and Mike Brown of Caltech announced intriguing evidence for a Neptune-sized planet orbiting the sun beyond Pluto. Sedna and five other objects in the outer solar system are grouped together as if they are being shepherded by a larger body. That body, say Batygin and Brown, is a planet at least 10 times as massive as Earth traveling along an elliptical orbit more than 200 AU from the sun. This is the most persuasive argument so far for the existence of a “Planet X.” Until someone actually sees the planet in a telescope, however, it’s just a hypothesis. So let the hunt begin! The full story was published in the Jan. 20th edition of Science Magazine.
