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Concept information

Terme préférentiel

planet core  

Définition

  • A planetary core consists of the innermost layers of a planet. Cores may be entirely solid or entirely liquid, or a mixture of solid and liquid layers as is the case in the Earth. In the Solar System, core sizes range from about 20% (the Moon) to 85% of a planet's radius (Mercury). Gas giants also have cores, though the composition of these are still a matter of debate and range in possible composition from traditional stony/iron, to ice or to fluid metallic hydrogen. Gas giant cores are proportionally much smaller than those of terrestrial planets, though they can be considerably larger than the Earth's nevertheless; Jupiter's is 10–30 times heavier than Earth, and exoplanet HD149026 b may have a core 100 times the mass of the Earth. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Planetary_core)

Concept générique

Synonyme(s)

  • planetary core

Traductions

URI

http://data.loterre.fr/ark:/67375/MDL-PJFTDBSQ-V

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