Where did our Moon come from? Well, actually, there have been several theories over many decades. Earlier versions of lunar formation theories included capture, where the Moon would have been a strayed planetoid. Another version was fission, where the Earth was spinning so fast that it would have
Artist’s impression of the Moon-forming event. Numerous moon formation theories have been suggested by researchers. Nonetheless, the most widely-accepted explanation, backed by the available evidence, posits that the moon resulted from a massive collision between the proto-Earth and another protoplanet approximately the size of Mars, often referred to as “Theia.” Credit: NASA/JPL-CalTech/T. PyleWell, actually, there have been several theories over many decades.
So where did our Moon come from? Well, currently, our understanding is that the Earth had collided with a Mars-sized object named Theia. But once we send future astronauts to the lunar surface again, who knows? We may actually have a whole new theory in the coming decades. Where did our Moon come from? Over the years, there have been several theories, but most scientists think it’s likely that a Mars-sized object smashed into Earth, creating what we now see in the sky.We Asked a NASA Expert Video Series
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