New study provides clearer insight into how the Moon formed and why its materials closely resemble those of Earth.

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The Earth formed over 4.6 billion years ago out of a mixture of dust and gas around the young sun. It grew larger thanks to countless collisions between dust particles, asteroids, and other growing ...

Computer simulations suggest that a collision with another planetary object early in Earth’s history may have provided the heat to set off plate tectonics. By Lucas Joel Some 4.5 billion years ago, ...

A planet called Theia collided with Earth, creating the Moon. Large, dense remnants of Theia exist deep within Earth's mantle. Computer models support the idea that these remnants are from Theia.

Et la Lune fut ! Une théorie élaborée il y a un demi-siècle prétend qu’une collision est à l’origine de l’astre de la nuit. Il y a 4,5 milliards d’années, un objet de la taille de Mars, baptisé Théia, ...

Might there have been more to the planet than met the eye? It’s only now that scientists have uncovered a beautiful clue to Earth’s ancient past and it was right under their feet. Well hidden deep ...

Astronomers have long suspected that the Moon formed roughly 4.5 billion years ago when a hefty planet-in-the-making called Theia collided with a young Earth. Now, researchers have found evidence that ...

Deux mystères de la science sont-ils en passe d’être résolus ? Des scientifiques ont proposé mercredi une nouvelle théorie susceptible d’en savoir plus sur la Lune et concernant les entrailles de ...

Try this experiment — all you need is a ball, pen, candle, match, protractor and a small rock. Draw a line bisecting the ball, top to bottom. Light the candle. Turn off the light. Holding the ball ...

(CNN) — Scientists widely agree that an ancient planet likely smashed into Earth as it was forming billions of years ago, spewing debris that coalesced into the moon that decorates our night sky today ...