Moon - Wikipedia
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).
Earth's Moon - Science@NASA
The Moon makes Earth more livable by moderating our home planet's wobble on its axis, leading to a relatively stable climate. It also causes tides, creating a rhythm that has guided humans for thousands of years. The Moon rotates exactly once each time it orbits our planet.
Moon Facts - Science@NASA
Jan 30, 2025 · As the Moon orbits Earth, different parts are in sunlight or darkness at different times. The changing illumination is why, from our perspective, the Moon goes through phases. During a "full moon," the hemisphere of the Moon we …
Daily Moon Guide | Observe - Moon: NASA Science
NASA's interactive map for observing the Moon each day of the year. WHAT WILL YOU SEE? This shows the Moon’s current phase in two ways: the percentage of the Moon’s nearside that …
Moon | Features, Phases, Surface, Exploration, & Facts | Britannica
4 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 Germanic and Old English derivation.
In Depth | Earth's Moon – NASA Solar System Exploration
The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate. It also causes tides, creating a rhythm that has guided humans for thousands of years.
Moon Phases - NASA Science
3 days ago · The eight lunar phases are, in order: new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent. The cycle repeats about once a month (every 29.5 days).
All About the Moon | NASA Space Place – NASA Science for Kids
Mar 17, 2025 · Earth has just one moon – a rocky, cratered place, roughly a quarter the size of Earth and an average of 238,855 miles away. The Moon can be seen with the naked eye most nights as it traces its 27-day orbit around our planet.
Moon - Glenn Research Center | NASA
Nov 22, 2023 · The Moon completes an orbit of the Earth every 27.3 days (approximately 655 hours). The Moon also rotates on its axis. Because of tidal forces, it completes one revolution every 655 hours.
Moon Fact Sheet - NSSDCA
Jan 11, 2024 · The orbit changes over the course of the year so the distance from the Moon to Earth roughly ranges from 357,000 km to 407,000 km, giving velocities ranging from 1.100 to 0.966 km/s. Lunar Atmosphere