Conventionally, the moon is thought to have formed during one big impact, but a three-impact model might make more sense ...

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

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

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed predicted by standard cosmology. Using highly sensitive data from multiple ...

One of the most elegant theories about the origins of life on our planet is that it was kick-started by a delivery from outer ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of Earth’s mantle and ejecting a huge debris disk that later formed the moon.

The picture-perfect launch of twin Escapade orbiters bound for Mars presages a fantastical new age in exploring the planets, ...

Apollo samples provide evidence: Researchers analyzed Moon rocks brought back by the Apollo missions and, for the first time, ...

Did you know that the Moon’s mother made sacrifices to give birth to it? Around 4.5 billion years ago, a Mars-sized planetary body named Theia collided with proto-Earth (early Earth) to form the Blue ...

According to researchers, the composition of a planet or celestial body holds the entire story of its formation and origin.

A small, icy traveler from deep space has just threaded its way through the inner Solar System, offering a fleeting but ...