The Moon

The Moon is believed to be 4.6 billion years old, which is the same age as the Earth. The Moon has no atmosphere or water.
The Moon is comprised of a rocky material that is heavily scarred with craters from meteorite impacts. The moon is composed of a core, partially molten mantle, and a crust.
The surface of the Moon is covered with craters, basins, and cratered highlands, called terrae. The soil that covers the Moon is called regolith, and is composed of rock fragments and fine dust grains. The maria are lowland plains that were once craters that were later flooded by lava. From Earth the terrae appear bright and the maria are dark.
The Moon keeps one side permanently turned towards Earth.
The gravitational forces between the Earth and the Moon effect the level of the ocean tides, causing the Earth to have two high tides per day.
The Moon has been visited by several spacecrafts since 1959. The first Moon landing was made by Apollo 11, on July 20, 1969. Neil Armstrong and Buzz Aldrin were the first human beings to walk on an extraterrestrial body. The Moon is the only extraterrestrial body that has ever been visited by humans and is also the only body from which samples were brought to Earth.