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 …

Moon Phase for today: Dec 14, 2025 The Moon's current phase for today and tonight is a Waning Crescent phase. This phase is best viewed just before the sunrise in the western sky. In this phase …

3 days ago · Like Earth, the Moon has a day side and a night side, which change as the Moon rotates. The Sun always illuminates half of the Moon while the other half remains dark.

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 …

Dec 11, 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 …

5 days ago · Research shows a full moon can modestly affect sleep, but its influence on mental health is much less certain.

2 days ago · President Donald Trump enshrined the U.S. goal to put humans back on the moon by 2028 and defend space from weapon threats in a sweeping executive order issued on Thursday, the first …

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

Sep 25, 2025 · NASA's Artemis II astronauts will embark on the first crewed U.S. mission to the moon in half a century. It could launch early in 2026.