The moon: In geophysical terms

In geophysical terms, the Moon is a planetary-mass object or satellite planet. Its mass is 1.2% that of the Earth, and its diameter is 3,474 km (2,159 mi), roughly one-quarter of Earth's (about as wide as the contiguous United States). A moon is an object that orbits a planet or another celestial body that is not a star. Discover the moon like never before! Interactive moon phases, 3D moon exploration, moon landing history, and lunar calendar designed for children. Learn about the moon through NASA missions and space exploration. The Moon, otherwise known as Luna, is the only natural satellite of Earth. It was created 4.6 billion years ago, and it is widely accepted that it was created when Earth collided with a planet-sized object called Theia. It’s the fifth-largest moon in our solar system and is the second brightest object in the sky (after the Sun). The Moon Profile orbit: 384,400 km from Earth diameter: 3476 km mass: 7.35e22 kg History of The Moon Called Luna by the Romans, Selene and Artemis by the Greeks ...