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The Moon Is Still Old

By wochit 12 January 2017

The moon formed at least 4.51 billion years ago, no more than 60 million years after the formation of the solar system, researchers report online January 11 in Science Advances. This update to the moon’s age is in line with some previous estimates although some argue the moon formed 150 million to 200 million years after the solar system’s birth. A precise age is important for understanding how Earth evolved and how the solar system behaved in its formative years, says study coauthor Melanie Barboni, a geologist at UCLA.