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

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

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

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

If you know any bit of information about how the moon was created, new research indicates that everyone has believed wrong.

The formation of the Moon may have come harder on the heels of Earth's birth than we thought. According to a new analysis by researchers from the US, France, and Germany, Earth's constant companion ...

Scientists continue to explore the deep story of how Earth and the moon formed. One idea has gained attention because it ...

Earth and the planetary object that gave rise to the Moon were likely born in the same region of the solar system.

About 4.5 billion years ago, Earth had a violent neighbor. A young, still-forming planet named Theia slammed into our world ...

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed ...

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

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