HomeAstronomyWhy we're always so entranced by the moon

Why we’re always so entranced by the moon

With NASA’s Artemis 1 mission launching to the moon this month, Space.com is taking a look at what we know about the moon and why we care. Join us for our Moon Week special report in the countdown to Artemis 1.

Some 4.5 billion years ago, a Mars-size celestial body named Theia slammed into a young, molten Earth, nearly decimating the planet. But from the debris created by this cataclysm, a new Earth formed — and so did our moon. (Or so the current leading theory of lunar formation goes, anyway.)

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