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 …

Nov 25, 2025 · 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 …

We see the full moon when the sun is directly behind us, illuminating a full hemisphere of the moon when it is directly in front of us.

Find the Moon’s illumination, distance, and latitude for any time on any date. The Moon has four primary and four intermediate lunar phases during a lunar month. Here's all you need to know …

2 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 …

Sep 25, 2025 · The other side of the Moon is dark. The position of the Moon and the Sun during Each of the Moon’s phases and the Moon as it appears from Earth during each phase. Credit: …

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.

16 hours ago · How to watch the last supermoon of the year: When and where will it be visible? Here's what to know about the last supermoon of the year, which will shine this week.

A lunar phase or Moon phase is the apparent shape of the Moon 's day and night phases of the lunar day as viewed from afar. Because the Moon is tidally locked to Earth, the cycle of …