A closer look at “How a Mars-Sized Protoplanet Named Theia May Have Crashed Into Earth to Form the Moon”, exactly as the source publishes it. The moon's origin has long puzzled scientists, but the leading explanation is the giant-impact hypothesis. This theory suggests that a Mars-sized protoplanet, often called Theia, collided with the early Earth billions of years ago. The immense energy from this cosmic crash would have vaporized much of Theia and a portion of Earth's outer layers, sending debris into orbit. Over time, that debris coalesced to form the moon.
While no direct evidence of Theia exists, computer models and analysis of lunar rocks support the idea. The moon's relatively small iron core and its isotopic similarities to Earth are consistent with such an impact. Understanding this event helps explain not just the moon's birth, but also Earth's tilt, rotation rate, and perhaps even the conditions that made our planet habitable. For the complete material, the listing points back to the source inside the network.