But now, new evidence has been presented by astronomers at Caltech which increases the likelihood of another, and fairly large, distant planet in the far outer reaches of the Solar System. (americaspace.com)
After having completed its successful encounter with Pluto and its moons last July, the New Horizons spacecraft is now setting its sights on its next target much farther out in the Kuiper Belt: a tiny rocky world called 2014 MU69, which is less than 30 miles in diameter and orbits nearly 1 billion miles past Pluto, in the far outer reaches of the Solar System. (americaspace.com)
Most comets reside unseen in the dark outer reaches of the solar system, frozen relics of the era when the planets formed 4.6 billion years ago. (discovermagazine.com)