https://www.livescience.com/space/planets/an-extra-solar-system-planet-once-orbited-next-to-earth-and-it-may-be-the-reason-we-have-a-moon
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12/1/25 at 9:04pm
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Live Science
Author
Sharmila Kuthunur
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Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial rocks reveals.
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