The Gemini Observatory has obtained a preliminary spectrum of 2003 UB313, the lastest so-called "10th planet". These observations were obtained on January 25, 2005 by Chad Trujillo, a Gemini staff ...

Claims that the Solar System has a tenth planet are bolstered by the finding by a group led by Bonn astrophysicists that this alleged planet, announced last summer and tentatively named 2003 UB313, is ...

Astronomers in the United States have announced the discovery of the "10th planet" to orbit our Sun. The largest object found in our Solar System since Neptune in 1846, it was first seen in 2003 - but ...

News Analysis An object said be a new planet on the fringes of the solar system isn't a true planet but probably an alien interloper from a distant star, says an expert on solar system formation. A US ...