The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are ...

Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of ...

"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.

A newly discovered cluster of objects called the “inner kernel” of the Kuiper belt could teach us about the early history of ...

Potential impactors are most likely to have low velocities and the highest likelihood of hitting Earth during the winter.

While the feds idled, an interstellar object known as 3I/ATLAS was barnstorming the solar system, at a speed that reached 153 ...

Theia, the world that helped form the Moon, came from the Solar System. Chemical clues in Earth and Moon rocks reveal this ...

One fateful day about 4.5 billion years ago, a Mars-sized body called Theia collided with proto-Earth, turning both into a ...

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon ...

Space has a knack for bending our sense of scale. The Moon feels close enough to touch—after all, we see its craters with ...

Astronomers have discovered our solar system occupies a rare "safety zone" in the Milky Way, perfectly positioned between the ...