Earth’s unusually large Moon may not have assembled gradually from a vast ring of debris after all. Under the right conditions, much of it could have emerged as an intact body only hours after another ...

The moon may have formed in as few as five hours after the cataclysmic collision between Earth and a long-lost protoplanet, new simulations suggest. The surprising findings could help shed light on ...

The moon could have formed in a matter of hours following the giant impact between Earth and a Mars-size protoplanet early in the history of the solar system. The theory comes from new simulations ...

New clues to the origin of the Moon surfaced this week, which reveal that the Earth and Moon are not as similar as previously thought, and part of the protoplanet that helped create the Moon may still ...

New modeling studies that factor in geologic strength found fundamental changes in how the moon may have formed from the collision between a Mars-sized impactor and Earth. Simulations using older ...

View larger. | Theia and Earth collided about 4.5 billion years ago, as depicted in this artist’s concept. The moon then formed out of the chaos. Image via Max Planck Institute for Solar System ...

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

The moon has been Earth’s constant companion for approximately 4.5 billion years, escorting the planet during its myriad journeys around the sun. While its origins are a little hazy — it cannot be ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth's chemical makeup solidified just three million years after the Solar System formed—yet it was a later collision with ...

Scientists have shown that Earth’s basic chemistry solidified within just three million years of the Solar System’s formation. Initially, the planet was barren and inhospitable, missing water and ...