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 …

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. …

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.

1 day ago · With our 2026 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.

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

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 satellite half a …

The Moon phase calculator shows exact times of the various moon phases for Des Moines, Iowa, USA in year 2025 or in other locations and years.

1 day ago · The first full moon of 2026 will be a special event known as a supermoon. Here's what it means and when it will peak.

On July 20, 1969, humans walked on the Moon for the first time.We look back at the legacy of our first small steps on the Moon and look forward to the next giant leap.