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.
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.