When a meteor streaks across the sky, it's not just beautiful. It's nature's way of delivering a time capsule to Earth.

New research shows that Theia, the planet that collided with Earth and formed the Moon, was a rocky world born closer to the ...

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

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

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

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

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed ...

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

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

About 4.5 billion years ago, Earth had a violent neighbor. A young, still-forming planet named Theia slammed into our world with enough force to melt vast portions of its mantle and scatter a huge ...

Moon’s precursor planet, Theia, disappeared billions ago, leaving scientists no direct chemical evidence to support the ...

Astronomers measure the speed at which the solar system is hurtling through space by mapping surrounding galaxies and ...