Soon after the Earth coalesced in the early solar system, it was hit by another planet, Theia. The collision formed ...

Scientists used to suspect a giant planet named "2MASS J2126-8140" was a rogue world, wandering the galaxy without a ...

Scientists have long suspected that our solar system might harbor a hidden planet. Now, after decades of searching, ...

A star in a faraway solar system has caused quite a stir among astronomers. Its light fluctuates dramatically and in ...

In a solar system not so far away, an Earth-size planet orbits a small star. The planet is rocky like our own, but ...

By some accounts, Enceladus is the number one place in our solar system to search for life. Sure, it looks icy on ...