The giant-impact hypothesis is presented as the leading explanation for the Moon's formation. The Moon's lower iron content, relative to Earth, is cited as evidence supporting the giant-impact theory, ...

It may be part of the night sky we look up at each night, but the moon's origins remain a mystery that has left scientists ...

Earth's moon formed inside a cloud of molten rock, and may have done so before our planet itself formed, a new theory suggests. Scientists call such a cloud a synestia, a doughnut-shaped ring of ...

WASHINGTON -- In a spectacle that might have beguiled poets, lovers and songwriters if only they had been around to see it, Earth once had two moons, astronomers now think. But the smaller one smashed ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The formation of the moon has long remained a mystery, but new studies support the theory that ...

Among the inner solar system, Earth is the only planet that experiences plate tectonics. A new study, using convection models, shows that Earth’s collision with the protoplanet Theia some 4.5 billion ...

A long-unsolved case of geological assault might now be resolved, thanks to the efforts of two University graduates. For years, geologists have been mystified by the formation of the Rocky Mountains, ...