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Nation/World

Scientists: The moon is 4.51 billion years old

FILE - In this Feb. 13, 1971 file photo, Apollo 14 astronaut Alan B. Shepard Jr. conducts an experiment near a lunar crater, using an instrument from a two-wheeled cart carrying various tools. On Wednesday, Jan. 11, 2017, a California-led research team reported that the moon formed within 60 million years of the birth of the solar system. Previous estimates ranged within 100 million years, all the way out to 200 million years of the solar system’s creation. (NASA via AP)
FILE - In this Feb. 13, 1971 file photo, Apollo 14 astronaut Alan B. Shepard Jr. conducts an experiment near a lunar crater, using an instrument from a two-wheeled cart carrying various tools. On Wednesday, Jan. 11, 2017, a California-led research team reported that the moon formed within 60 million years of the birth of the solar system. Previous estimates ranged within 100 million years, all the way out to 200 million years of the solar system’s creation. (NASA via AP)

CAPE CANAVERAL, Fla. – It turns out the moon is older than many scientists suspected: a ripe 4.51 billion years old.

That's the newest estimate, thanks to rocks and soil collected by the Apollo 14 moonwalkers in 1971.

A research team reported Wednesday that the moon formed within 60 million years of the birth of the solar system. Previous estimates ranged within 100 million years, all the way out to 200 million years after the solar system's creation.

The scientists conducted uranium-lead dating on fragments of the mineral zircon extracted from Apollo 14 lunar samples. The pieces of zircon were minuscule — no bigger than a grain of sand.

Lead author Melanie Barboni of UCLA says knowing the age of the moon is key to understanding the formation and evolution of Earth.

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