Luna Nova: Moon of the Cretaceous Skies

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The Moon is moving away from the Earth a few centimeters each year, so here, 85 million years in the past, it’s much closer to Earth. How much closer was the Moon to Earth 85 million years ago? Do the math, brain: The Moon is currently moving away from the Earth at about 3.8 centimeters per year, so 3.8 cm for 85 million years equals 323 million centimeters. Sounds like a lot, right? 323 million of just about anything seems like a lot. 323 million centimeters is 3,230,000 meters, or 3,230 kilometers.  more...