Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

A study from a team of noted astronomers soon to be published in the journal Icarus lays out the argument for readmitting Pluto. However, it'll bring a lot of friends. Share on Facebook (opens in a ...

These icy bodies orbit the sun just like the major planets, yet they follow their own rules, often traveling along elongated ...