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 …

May 21, 2026 · The Moon makes Earth more livable, sets the rhythm of ocean tides, and keeps a record of our solar system's history. Explore NASA lunar science here.

Track the moon phase today with our interactive moon phase calculator. Get details on the current moon phase and the next full moon phase.

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 …

1 day ago · The meaning of MOON is the earth's natural satellite that shines by the sun's reflected light, revolves about the earth from west to east in about 29½ days with reference to the sun or about 27⅓ …

May 26, 2026 · NASA will give an update on Tuesday afternoon (May 26) about its plans to build a moon base, and you can watch it live. An international team of researchers say they've found a more …

Moon phases for 2026 or any year. New Moon and Full Moon calendar with precise times and simulation of the Moon phase today. When is the next Full Moon?

Nov 5, 2025 · Explore interesting moon facts, from its phases and orbit to tides, eclipses, surface features, and future lunar exploration.

1 day ago · Though a Full Moon only occurs during the exact moment when Earth, Moon, and Sun form a perfect alignment, to our eyes, the Moon seems Full for around three days.

3 days ago · A rare Blue Moon, the second full moon in May, will also be a "micromoon" near its farthest point from Earth.