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 contiguous United States).
Moon | Features, Phases, Surface, Exploration, & Facts | Britannica
6 天之前 · 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 Germanic and Old English derivation.
All About the Moon | NASA Space Place – NASA Science for Kids
2025年1月14日 · Earth has just one moon – a rocky, cratered place, roughly a quarter the size of Earth and an average of 238,855 miles away. The Moon can be seen with the naked eye most nights as it traces its 27-day orbit around our planet.
Liftoff! NASA Sends Science, Tech to Moon on Firefly, SpaceX Flight
2025年1月15日 · Once on the Moon, NASA will test and demonstrate lunar drilling technology, regolith (lunar rocks and soil) sample collection capabilities, global navigation satellite system abilities, radiation tolerant computing, and lunar dust mitigation methods. The data captured could also benefit humans on Earth by providing insights into how space ...
Everything you need to know about the Moon | Astronomy.com
2023年9月7日 · The Moon is Earth’s only permanent natural satellite, and it’s the fifth-largest satellite in our solar system.
Earth's moon, facts and information - National Geographic
2019年7月3日 · The moon, Earth’s sole natural satellite, is our constant companion. It has circled our planet for billions of years, since before the first sparks of life flickered in the oceans—before Earth ...
Moon | Glenn Research Center | NASA
2023年11月22日 · The Moon completes an orbit of the Earth every 27.3 days (approximately 655 hours). The Moon also rotates on its axis. Because of tidal forces, it completes one revolution every 655 hours.
In Depth | Earth's Moon – NASA Solar System Exploration
The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate. It also causes tides, creating a rhythm that has guided humans for thousands of years.
Facts About the Moon - National Geographic
2004年7月16日 · 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 century ago. How did the moon form? Why...
Moon Viewing Guide - NASA Science
You can look at the Moon during any of its illuminated phases, but for better viewing of craters and mountains, try phases other than the full Moon. The shadows on the surface will be more pronounced, and help distinguish features you might otherwise miss.