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How old is the Moon?
In 1972, during the Apollo 17 mission, astronauts collected soil and rock samples from the moon. Recently, scientists analysed zircon crystals within a rock collected by astronaut Harrison Schmitt, shedding light on the moon’s age and formation. Their findings indicate that the moon is approximately 40 million years older than previously believed, forming more than 4.46 billion years ago. This insight helps support the theory that a Mars-sized object, named Theia, collided with Earth during the solar system’s early history. This impact sent molten rock into space, forming a debris disc that eventually coalesced into the moon. Using a method called atom probe tomography, scientists confirmed the age of these ancient zircon crystals. These findings are crucial in understanding the moon’s role in stabilising Earth’s axis and its impac