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 …

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 …

Jun 25, 2025 · The Earth and Moon are tidally locked. Their rotations are so in sync we only see one side of the Moon. Humans didn't see the lunar far side until a Soviet spacecraft flew past …

3 days ago · 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 …

2 days ago · Moon, or Luna in Latin, is planet Earth’s one and only natural satellite and the brightest object in the night sky. With a diameter of 2,159.2 miles (or 3,474 km), it is roughly …

2 days ago · With our 2025 Moon Phase Calendar, you'll find the current Moon phase for tonight—plus, all the phases of the Moon for each day of the month.

4 days ago · Today's lunar phases, including the moon age and details such as moonrise and moonset. Discover when the moon will reach the full moon phase with a countdown timer.

Sep 7, 2023 · How big is the Moon? The Moon is Earth’s only permanent natural satellite, and it’s the fifth-largest satellite in our solar system. The Moon’s diameter is approximately 2,160 miles …

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 explored Earth's only natural …

NASA's interactive map for observing the Moon each day of the year.