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The Moon is Earth's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have synchronized the Moon's orbital period (lunar month) with its rotation period at 29.5 Earth days, causing the same side of the Moon to always face ...
Earth's Moon is 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.
What is the moon made of, and how did it form? Learn about the moon's violent origins, how its phases shaped the earliest calendars, and how humans first exp...
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Learn about the Moon's origin, structure, surface, orbit, phases, and potential for life. Explore the Moon's history, missions, and curiosities with NASA's science and visualizations.
The best times to see a daytime Moon are perhaps during the first and last quarter phases, when the Moon is high enough above the horizon and at about 90 degrees from the Sun in the sky. This helps make the Sun’s reflected light bright enough to see as it reflects off of the Moon.
Learn how the Moon orbits Earth, why we only see one side of it, and how its tilt affects eclipses. Explore the Moon's features, history, and missions with NASA's videos and resources.
Learn about the Moon's origin, structure, surface, orbit, phases, and potential for life. Find out how the Moon affects Earth's climate, tides, and exploration.
