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 …

Jan 23, 2026 · Your interactive map for observing the Moon each day of the year, featuring detailed views from NASA's Lunar Reconnaissance Orbiter, plus special Moon events.

Jan 3, 2026 · Use our Moon Phase Calendar to find dates and times of the full Moon, new Moon, and every phase in between. Beyond the phases of the Moon, you will also see daily Moon …

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 planets, stars, and constellations in your night sky. See the Moon's position in its orbit around Earth in real-time as well as past and future Moon phases, illumination, distance from Earth, …

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 …

The moon is the Earth's only natural satellite and the closest celestial object. Learn about the moon and some of the theories about the moon's origin.

Jan 23, 2026 · 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 …

1 day ago · The ‘snow moon’ will rise in the skies over Chicago to kick off the month of February, but there is another celestial show looming this winter.

12 hours ago · We're only days away from the Full Moon now, so when we look up there is plenty to see. Keep reading to find out exactly what's on display. What is today’s Moon phase? As of …