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The Solar System EssayAstronomers have found a new dwarf satellite far beyond Plutos orbit, suggesting that this distant realm contains millions of undiscovered objects including, perhaps, a world larger than Earth. The newfound celestial body, called 2012 VP113, joins the dwarf artificial satelliteSedna as a confirmed resident of a far-flung and largely unexplored region scientists call the inner Oort Cloud. Further, 2012 VP113 and Sedna may have been pulled into their long, looping orbits by a big planet lurking unseen in these pivotal depths. These two objects are just the tip of the iceberg, study co-author Chadwick Trujillo, of the Gemini Observatory in Hawaii, told Space. com. They exist in a part of the solar constitution that we used to think was pretty devoid of matter. It just goes to show how little we actually know about the solar system. New Dwarf Planet PhotosThe orbits of Sedna (orange) and dwarf planet 2012 VP113 (red). Also shown are the orbits of the giant planets (purple). The Kuiper belt is the dotted light blue region. Illustration Scott S Sheppard/Carnegie Institution for Science Astronomers have increased the size of the manifest solar system after spotting a 450-km wide object orbiting the sun. The lump of ice and rock circles the sun at a greater duration than any known object, and never gets closer than 12bn kilometres 80 times the distance from Earth to the sun. If its size is confirmed it could qualify as a dwarf planet in the same category as Pluto. Researchers said the discovery proves the existence of the inner Oort cloud, a region of icy bodies that lies far beyond the orbit of Neptune which at 4.5bn kilometres from the sun is the most remoteplanet in the solar system.Until a proper name is decided upon, the body is known only as 2012 VP113. fit in to the science journal Nature, the team that discovered it call it VP for short, or Biden, after US vice president Joe Biden. Its pink tinge comes from radiation damage t hat alters the pee-pee of frozen water, methane and carbon dioxide on the surface. Though exciting in its own right, the discovery raises a more tantalising prospect for many astronomers that a ace Earth up to 10 times the mass of our planet orbits the sun at such a great distance that it has never been seen.