Moon - Wikipedia
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 Facts - NASA Science
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. …
Moon Phases Calendar: What's the Moon Phase Today?
Feb 1, 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 illumination …
Everything you need to know about the Moon - Astronomy.com
Sep 7, 2023 · How big is the Moon? The Moon is Earth’s only permanent natural satellite, and it’s the fifth-largest satellite in our solar system. The Moon’s diameter is approximately 2,160 miles (3,475...
Facts About the Moon | National Geographic
Jul 16, 2004 · 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.
The Moon - Griffith Observatory - Southern California’s gateway to …
The phase of the Moon depends on its position relative to the Earth and Sun. As the Moon orbits the Earth, the amount of sunlight falling on the side of the Moon facing Earth changes.
Moon 101 - National Geographic Society
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 …
Scientists Say They May Have Found a Long-Lost Lunar Lander—the …
11 hours ago · Scientists Say They May Have Found a Long-Lost Lunar Lander—the First to Successfully Touch Down on the Moon 60 Years Ago Data from a NASA lunar orbiter has helped …
Moon | Features, Phases, Surface, Exploration, & Facts | Britannica
5 days ago · 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 …
NASA is sending Artemis II to the moon. Here’s what to know
15 hours ago · The first crewed mission of the Artemis program won’t land on the moon, but it aims to take four astronauts farther from the Earth than anyone has gone before.