Some Moon facts
On average, the Moon is roughly 384,402 km away from Earth, or about 238,856 miles. The second-densest moon in our solar system (behind Jupiter's Io), it is 1/81 the size of Earth, which, relative to the planet it orbits, is pretty large by moon standards.
Though humanity has been studying the Moon for years, it was not until July 21, 1969, when Neil Armstrong walked on its surface, becoming the first man in history to do so. His Apollo 11 mission was the first of seven that were to send astronauts to the Moon, though Apollo 13 never made it.
In total, 12 people have walked on the Moon, with the last coming in 1972. Since then, many other countries have had missions involving the Moon, and there are more scheduled for the coming years.
