Both orbit the same star, 20 light-years from Earth, called Gliese 581. The larger of the wo orbits in the 'habitable zone,' and could have oceans.
After locating more than 340 planets orbiting other stars, astronomers have identified two that are the most similar to Earth so far. Full story:
* Planet Gliese 581c and Planet X/Eris/Nibiru - Nibiru is one of many Planets that orbit a dark star or (Brown Dwarf). This Dark Star has five minor planets, the sixth an Earth-sized Homeworld, and the seventh the planet or object we call Nibiru... it is the physical link or "ferry" between our solar system and the dark star system of it's Brown Dwarf Star:
* IMAGES OF PLANET X/ NIBIRU: