Astronomers have confirmed a Saturn-size world drifting alone in deep space roughly 10,000 light-years from Earth, a discovery that turns a once-theoretical idea into a measured reality. The planet ...

A crash involving the planet’s largest moon, Titan, and a hypothetical moon may have triggered a curious sequence of events ...

Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will appear together shortly after sunset on Feb. 28 — but is this the "planet parade" we've been waiting for?

Under this new model, Titan itself is the result of a collision between two earlier moons: a large body called “Proto-Titan,” ...

Titan, the largest moon of Saturn, may have been even more instrumental to the system’s evolution than we thought, forming ...