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A Mars sized body struck a glancing blow to the nascent earth a little more than 4.5 billion years ago. The resulting debris cast off orbited the earth, coalescing into the moon in as little as ten thousand years.

The matter for both earth and moon were forged in the heart of a giant star, perhaps six to eight billion years ago. That star was itself a second or third generation star from the origin of the universe, 13.7 billion years ago.

We know our universe is 13.7 billion years old from careful analysis of the data provided by the COBE & WMAP satellites.

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