Moon and Earth to Scale

月球与地球比例

The diameter of the Moon is 3480 km or 27% of the Earth's equatorial diameter of 12,756 km. The mass of the moon is 1.23% of the mass of the Earth, or about 1/80th. The density of the Moon is 3.34 g/cm³ compared to 5.52 g/cm³ for the Earth, so its overall composition is quite different, apparently lacking a large iron core. This composite image uses the famous "Blue Marble" image of the Earth taken by the Apollo 17 astronauts. Image credit NASA.

月球的直径是3480公里，或地球赤道直径12,756公里的27%。月球的质量是地球质量的1.23%，约为地球的1/80。月球的密度为3.34 g/cm³，而地球的密度为5.52 g/cm³，因此其整体成分差异显著，显然缺乏一个大的铁核。这张复合图像使用了由阿波罗17号宇航员拍摄的著名“蓝宝石”地球图像。图片版权：NASA。

The Sun's diameter of 1,392,000 km is 109 times the Earth's equatorial diameter of 12,756 km. The distance to the Earth from the sun at 149,000,000 km = 1 AU is 107 times the diameter of the Sun and 388 times the Earth-Moon distance. The Earth-Moon distance is not shown to scale in the above composite. The diameter of the Sun is 3.6 times the Earth-Moon distance. Above, the Earth and Moon are scaled relative to an image of the Sun made by the SOHO satellite on January 12, 2007.

太阳的直径为1,392,000公里，是地球赤道直径12,756公里的109倍。太阳到地球的距离为149,000,000公里=1 AU，是太阳直径的107倍，也是地球-月球距离的388倍。上述复合图中未按比例显示地球-月球距离。太阳的直径是地球-月球距离的3.6倍。上述图中，地球和月球的尺寸是根据2007年1月12日SOHO卫星拍摄的太阳图像进行比例缩放的。

月球与地球的平均距离为384,000公里，相当于30.1个地球直径。