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Could The Moon Have Formed In An Afternoon? New Simulations Say It's Possible – But It Depends On The Temperatures Of Two Colliding Planets

Summary by IFLScience
They say Rome wasn't built in a day, but it's possible that the Moon was.

9 Articles

One of the most dramatic events in the history of our solar system may have happened much faster than we thought. According to a new study, our moon could have formed almost entirely in just five hours after a massive collision about 4.5 billion years ago. For decades, the accepted explanation was that an ancient Mars-sized body called Theia crashed into the young Earth. The impact hurled vast amounts of molten rock into space, creating a debris…

The origin of the moon has received a new explanation: a satellite could have formed 5 hours after a cosmic collision, a study by the Southwest Institute showed.

·Kyiv, Ukraine
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A new study argues that the formation of the Moon could be completed in just 5 hours after the impact of Theia, and not in months.The entry The formation of the Moon could last only 5 hours, and not months, according to a new study it was first published in What!.

The prevailing theory for the existence of the Moon states that a space body the size of the planet Mars fell 4.5 billion years ago on Earth and as a result... The Moon was created in just 5 hours, new study reports - ΘΑΦΤΕΜΟΠΟΡΙΚΙ

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IFLScience broke the news in Sudbury, United Kingdom on Wednesday, September 2, 2026.
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