5 lesser-known facts about the Moon that will blow your mind

The Moon is called "Moon" because people didn’t know others existed until Galileo discovered Jupiter’s moons in 1610

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The Earth and Moon are tidally locked, so we only see one side. The far side wasn’t seen until a Soviet flyby in 1959

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Over 105 robotic spacecraft have explored the Moon, the only celestial body humans have visited so far

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The Moon's radius is 1,080 miles, less than a third of Earth's width. If Earth were a nickel, the Moon would be a coffee bean

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The Moon is 238,855 miles away, enough to fit 30 Earths in between and drifts an inch farther each year from Earth

Image Credit: NASA