The Moon, also called Luna is the only natural satellite of the Earth. It was formed when a rock with size of Mars, hit the Earth around 4.6 billion years ago.
Facts about the Moon:
- The average distance between the Moon and the Earth is 384.403 kilometers (238.857 miles).
- The diameter of the Moon is four times smaller than the diameter of the Earth and 49 Moons can be fit inside the Earth.
- From Earth, we can see only the one side of the Moon (60% of its surface). The other side is a myth because exactly the same time is needed for the Moon to rotate around its own axis and orbit the Earth.
- The Moon has smaller mass and weaker gravity than the Earth, so a human on the Moon would weight about one sixth of the weight on Earth.
- With 4.700 meters Mons Huygens is the highest mountain on the Moon. The highest mountain on the Earth is Mount Everest with 8.848 meters almost two times taller than the Mons Huygens.
- The Moon has no atmosphere and it is unprotected from cosmic rays, solar winds and meteorites.
- The temperature on the Moon’s surface can reach 253 degrees Fahrenheit (123 degrees Celsius) during the daytime and minus 243 degrees Fahrenheit (minus 153 degrees Celsius) during the nighttime.
- In 1950 the U.S. Air Force has a plan to detonate a nuclear bomb on the surface of the Moon in order to demonstrate its military power during the Cold War.
- Luna 1, the Soviet craft was the first spacecraft to reach the Moon in 1959.
- The American astronaut Neil Armstrong from the Apollo 11 mission was the first human that walked on the Moon in 1969.
- Only 12 people have been walking on the Moon and the last one was Gene Cernan in 1972 from the Apollo 17 mission. NASA plans to send a man on the Moon again in 2019.