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).

5 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.

2025年2月7日 · The Moon makes Earth more livable 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. The Moon rotates exactly once each time it …

2025年1月30日 · As the Moon orbits Earth, different parts are in sunlight or darkness at different times. The changing illumination is why, from our perspective, the Moon goes through phases. During a "full moon," the hemisphere of the Moon we …

2 天之前 · "Goodbye Earth, hello moon," Firefly said in an update on its mission blog the day before it planned to leave Earth behind and enter the lunar orbit. As of Monday, the Blue Ghost spacecraft had ...

NASA's interactive map for observing the Moon each day of the year. WHAT WILL YOU SEE? This shows the Moon’s current phase in two ways: the percentage of the Moon’s nearside that …

14 小时之前 · Firefly's lunar lander, named Blue Ghost, entered orbit around the moon last week, ending a four-day transit from Earth and starting to gear up for a lunar touchdown. In the lead-up to that ...

2 天之前 · During the total lunar eclipse, which will last about five hours, the full moon will travel through Earth's shadow and take on a striking reddish hue for 65 minutes. Unlike a total solar eclipse ...

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.

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.