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Rock collected by Apollo 17 astronaut in 1972 reveals moon's age

During the Apollo 17 mission in 1972 - the last time people walked on the moon - U.S. astronauts Harrison Schmitt and Eugene Cernan collected about 243 pounds (110.4 kg) of soil and rock samples that were returned to Earth for further study. A half century later, crystals of the mineral zircon inside a coarse-grained igneous rock fragment collected by Schmitt are giving scientists a deeper understanding about the moon's formation and the precise age of Earth's celestial partner. The moon is about 40 million years older than previously thought - forming more than 4.46 billion years ago, within 110 million years after the solar system's birth, scientists said on Monday, based on analyses of the crystals. ....

United Kingdom , United States , University Of Chicago , Jennika Greer , Eugene Cernan , Serenitatis Sea , Lisa Shumaker , Bidong Zhang , Johnson Space Center , Field Museum , University Of Glasgow , Philipp Heck , Geochemical Perspectives , Mare Serenitatis , Space Center , Will Dunham , Harrison Schmitt , Walked On The Moon , Zircon Crystals , Primordial Earth , Philipp Heck , Ineral Zircon ,