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 …

Dec 26, 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 of Earth, is of …

The Moon: Complete and live astronomy data, visibility information, sky charts, graphs, and tools for sky-watchers at all levels.

Dec 29, 2025 · 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.

Below, find an interactive moon phase calculator showing lunar phases, illumination, moonrise/set times, and special moon events for any location worldwide. View a moon phase calendar or check specific …

Dec 15, 2025 · Europe's plans to develop its "Argonaut" robotic moon lander are moving ahead with the announcement of an Italy-led consortium that will build a key element of the spacecraft.

Dec 27, 2025 · NASA’s plans to launch astronauts to the moon in early 2026. The Artemis II mission is expected to carry a crew around the moon — though not to the lunar surface.

Nov 19, 2021 · Articles About Moon (68) The Moon Phases The Moon has four primary and four intermediate lunar phases during a lunar month. Here's all you need to know about each phase of …

6 days ago · The moon and sun figure big in the new year’s lineup of cosmic wonders Here’s a rundown on what the universe has in store for us in 2026.

Dec 17, 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 in 1959. …