It's an Earth sandwich! What if we placed our Earth between our Solar System's two asteroid belts: the Main Asteroid Belt and ...

Earth's "second moon" won't be sticking around for Thanksgiving, but just as many of us will on Thursday (Nov. 28), it seems ...

Scientists simulated a situation that may offer an improved explanation for how the Red Planet ended up with small Phobos and ...

Pluto and other large bodies in the Kuiper Belt are surprisingly rich in rock rather than ice. It may be because the early ...

Solar and cosmochemical data indicate high levels of carbon, nitrogen, and oxygen in the Sun. Researchers have unveiled a new ...

It must have cleared all other celestial bodies, except its own moons, from its orbit.

"Solar system formation models using the new solar composition successfully reproduce the compositions of large Kuiper Belt ...

Astronomers have been curious about the makeup of Ceres, the largest object in the asteroid belt, ever since its discovery by ...

For nearly 40 years, scientists have generally agreed that Earth's Moon formed from debris after a massive collision with our ...