There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

Not only is it difficult to understand what goes on beyond the limits of the solar system that our planet calls home, the ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.