The Moon is Earth's only natural satellite. At about one-quarter the diameter of Earth, it is the largest natural satellite in the Solar System relative to the size of its planet, the fifth largest satellite in the Solar System overall, and is larger than any dwarf planet. Orbiting Earth at an average distance of 384,400 km, or about 30 times Earth's diameter, its gravitational influence slightly lengthens Earth's day and is the main driver of Earth's tides. The Moon is classified as a planetary-mass object and a differentiated rocky body, and lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's; Jupiter's moon Io is the only satellite in the Solar System known to have a higher surface gravity and density. The Moon's orbit around Earth has a sidereal period of 27.3 days.
关于Moon
Astronaut Sam Bell is just at the end of his three-year stint on the Moon when he has a violent, almost fatal, attack and decides he is going to find a way back to Earth by himself.
Moon的成就
Duncan Jones wrote and directed the film. The film was shot in just over a month.
您不知道Moon的热门事实
Moon Category.. Moons.. Planetary satellite systems.. Astronomical objects known since antiquity.
