Researchers discover possible ninth planet beyond Pluto – video

Computer simulations show the mystery planet, if it exists, would orbit about 20 times farther away from the sun than Earth, according to astronomers with the California Institute of Technology in Pasadena. Nicknamed Planet Nine, it moves on an extremely elongated orbit and takes 10,000 to 20,000 years to swing once around the sun. Caltech researchers say the planet would be about 10 times bigger than Earth. The planet is so large that with sensitive enough telescopes astronomers should be able to see it crossing the night sky