The remnants of a protoplanet that slammed into Earth and created the moon may still be lurking deep in our planet's mantle. New research suggests that this impactor, which hit a just-formed Earth 4.5 ...

PASADENA, Calif. — Continent-sized remnants of another world could be found deep inside the Earth, according to a new study coming out of California. Researchers believe the remnants could be pieces ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A protoplanet slammed into the Earth about 4.5 billion years ago, knocking loose a chunk of rock ...

Our solar system is much like a trail of microcosmic breadcrumbs: Follow the molecular bits as far back as they go, and you'll learn a thing or two about where many of our planets and other celestial ...

NASA’s mission to the still, metal heart of a proto-planet isn’t dead after all. The agency announced on October 28 that after months of scrutiny, an independent review board has decided it’s possible ...

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Debris from the impact between Earth and the protoplanet eventually formed the moon. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The newborn ...

A new paper suggests that Uranus might still contain evidence of the catastrophic impact that knocked it on to its side and shaped much of its evolutionary history. If it's accurate, there are some ...

Giant asteroid Vesta is so enormous, many astronomers don’t even refer to it as an asteroid, preferring to call the celestial body a “protoplanet.” This image, which compares Vesta to eight other ...