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

"During the early solar system's game of cosmic billiards, Earth was struck by a neighbor,” said Dauphas. “It was a lucky shot. Without the moon's steadying influence on our planet's tilt, the climate ...

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 ...

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

New research reveals that Theia, the colossal, Mars-sized impactor that collided with the Earth to birth our Moon, may have ...

New research suggests Earth's Moon formed from the catastrophic collision of our planet with its "sister" planet, Theia, born nearby. This "sibling" planet theory, supported by iron isotope evidence, ...

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

If you look up on a clear night, the brightest and largest object in the sky will probably be the moon. And unless you have a decent telescope, it is the only natural satellite you can see with your ...

This discovery was made by two of NASA’s most celebrated telescopes. This illustration provided by Dan Durda shows the exoplanet Kepler-1625b with a hypothesized moon. On Thursday, Oct. 4, 2018, two ...

Small icy moons in the outer reaches of our solar system may hide boiling oceans underneath their surfaces, a new study finds.

The onset of the Artemis Moon exploration program next week will probably put humanity on a path to the colonization of the solar system. Although the main goal is to put human boots on the Moon once ...