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Schematic illustration of the internal structure of the Moon. Several lines of evidence imply that the lunar core is small, with a radius of about 350 km or less. [5] The diameter of the lunar core is only about 20% the diameter of the Moon itself, in contrast to about 50% as is the case for most other terrestrial bodies.
Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 20% of Earth's radius or 70% of the Moon's radius. [1] [2] There are no samples of the core accessible for direct measurement, as there are for Earth's mantle. [3]
Geological studies of the Moon are based on a combination of Earth-based telescope observations, measurements from orbiting spacecraft, lunar samples, and geophysical data. . Six locations were sampled directly during the crewed Apollo program landings from 1969 to 1972, which returned 382 kilograms (842 lb) of lunar rock and lunar soil to Earth [8] In addition, three robotic Soviet Luna ...
The internal structure of the inner planets. The internal structure of the outer planets. A planetary core consists of the innermost layers of a planet. [1] Cores may be entirely liquid, or a mixture of solid and liquid layers as is the case in the Earth. [2]
The Moon can be described as all of the following: Natural satellite – celestial body that orbits another celestial body of greater mass (e.g. a planet, star, or dwarf planet), called its primary. [1] [2] For example, the Moon is a natural satellite of Earth, and Earth is a natural satellite of the Sun.
The transition between the inner core and outer core is located approximately 5,150 km (3,200 mi) beneath Earth's surface. Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 19% of Earth's radius [0.7% of volume] or 70% of the Moon's radius.
Lunar nearside with major maria and craters labeled. Lunar maria (singular mare) are large, dark, regions of the Moon.They do not contain any water, but are believed to have been formed from molten rock from the Moon's mantle coming out onto the surface of the Moon.
English: Illustration of Earth and Moon at the average distance from each other (semi-major axis) as seen from distant space If the preview width is 800 pixels wide, then each pixel is 500 km on the preview. This image is almost identical in proportions to File:Earth-Moon2.jpg