An unnamed planet has been discovered in our own planetary system. It is an unusually hot gas giant that dwarfs everything, including Jupiter. Unnamed planet has a mega-massive size, along with rings of shattered Kuiper Belt objects. It orbits in the opposite direction, counter to all the other known planets. This is an indication that it did not originally form in our Solar System. It could have been a planet that was born elsewhere, and roamed throughout the galaxy, only to be captured by our Sun. Look at this planet on BBC News Sci/Tech: A Planet Beyond Pluto.