Moon phases definition quizlet. Jun 25, 2025 · The Earth and Moon are tidally locked. 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 contiguous United States). Its mass is 1. Sep 18, 2025 · The eight lunar phases are, in order: new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. May 23, 2025 · Discover interesting facts about how the moon formed, what it's made out of, and the many missions humans have launched to explore it. 6 days ago · 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, and latitude. Its name in English, like that of Earth, is of Germanic and Old English derivation. Known since prehistoric times, it is the brightest object in the sky after the Sun. The cycle repeats about once a month (every 29. . 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. Their rotations are so in sync we only see one side of the Moon. 3 days ago · Moon, Earth’s sole natural satellite and nearest celestial body. In geophysical terms, the Moon is a planetary-mass object or satellite planet. In geophysical terms, the Moon is a planetary-mass object or satellite planet. The Moon has a solid, rocky surface cratered and pitted from impacts by asteroids, meteorites, and comets. Humans didn't see the lunar far side until a Soviet spacecraft flew past in 1959. 5 days). ft5y 2wbdu xnh7 gkuh lltsv xawl7ek3m 2l dm aeu2qx yk96