The Moon is Earth's only natural satellite, orbiting at an average distance of 384 399 km (238,854 mi; about 30 times Earth's diameter). It faces Earth always with the same side. This is a result of Earth's gravitational pull having synchronized the Moon's rotation period with its orbital period (lunar month) of 29.5 Earth days.

2025年3月17日 · 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.

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.

2025年1月30日 · More than 105 robotic spacecraft have been launched to explore the Moon. It is the only celestial body beyond Earth – so far – visited by human beings. The Moon's weak atmosphere and its lack of liquid water cannot support life as we know it. Apollo astronauts brought back a total of 842 pounds (382 kilograms) of lunar rocks and soil to Earth.

5 天之前 · 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.

2025年2月25日 · The Moon is a natural satellite, or a space object that orbits around something else. Our Moon is Earth’s natural satellite. In general, a moon is a natural satellite of a planet, and a planet is a special kind of natural satellite that orbits a star and also meets other conditions. Learn more: What makes a planet a planet? How did the Moon form?

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.

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 …

2023年11月22日 · 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.

2025年2月25日 · This Moon-mosaic is comprised of 1,231 images taken by the Lunar Reconnaissance Orbiter's (LRO) Narrow-Angle Camera (NAC) in the summer... National Aeronautics and Space Administration. NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery.