2006, unless if there is an undiscovered ice planet in the Kuiper Belt , Scattered Disc , or inner Oort Cloud about the size of Mars . But there are three known extrasolar ice planets as of September 20, 2012: Leucothoa ( OGLE-2005-BLG-390Lb , P 166), Endeis ( MOA-2007-BLG-192Lb , P271),