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 …

5 days ago · 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.

Feb 17, 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 of Earth, is of …

Jan 3, 2026 · Order Your Almanac Today! Never miss a full moon, eclipse, or meteor shower with reminders from the Almanac Daily newsletter.

9 hours ago · Check the Moon phase today with our live Moon Phase Tracker. See if it’s a Full Moon, New Moon, or Crescent in real time.

Moon Phase for today and tonight with current lunar phase, illumination percentage and Moons age. Find out what the Moon Phase is on any other day of the year.

17 hours ago · Follow our live blog for the March 2026 blood moon total lunar eclipse! Get real-time updates on where to see it, peak times, and stunning views.

Explore the current phase of the moon, its rise and set times, nightly motion across the sky, and discover lunar features with our interactive map. Stay informed about the celestial movements above.

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 …

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