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 …

Dec 29, 2025 · Like Earth, the Moon has a day side and a night side, which change as the Moon rotates. The Sun always illuminates half of the Moon while the other half remains dark.

2 days ago · Discover fascinating Moon facts—from its size and orbit to gravity, brightness, and temperature. Learn what makes Earth’s Moon truly unique.

Dec 5, 2024 · A moon is an object that orbits a planet or something else that is not a star. Besides planets, moons can circle dwarf planets, large asteroids, and other bodies. Objects that orbit other …

May 23, 2023 · Learn how Earth's moon formed, how its orbit affects Earth's tides, why solar and lunar eclipses happen and the history of lunar exploration.

2 days ago · Moon, Earth’s sole natural satellite and nearest celestial body. Known since prehistoric times, it is the brightest object in the sky after the Sun. Its name in English, like that of Earth, is of …

Track the Moon's distance from Earth in real-time with our interactive l unar distance calculator. See live distance updates, supermoon/micromoon alerts, and animated orbital diagrams showing exactly how …

2 days ago · 10 biggest myths about the Apollo moonlandings busted. Why conspiracy theorists are wrong about the 'evidence' we never landed on the Moon.

5 days ago · The Space Launch System and Orion capsule were transported to the launchpad before an astronaut mission that could launch as soon as Feb. 6.

Learn about the moon and some of the theories about the moon's origin.