Cutaway illustration showing the internal structure of Mercury, the smallest planet of the Solar System. Mercury has a radius of 2439 kilometres (km). Data compiled by the Messenger probe that orbited the planet between 2011 and 2015 revealed its composition. It has a rocky crust about 40 km thick, that covers a 400 km thick silicate mantle. Below this is an iron sulfide (FeS) layer that is 50 km thick and a huge metallic core with a radius of 1950 km. The outer core (1000 km) is composed of molten iron while the inner core (950 km) is solid iron. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Clarivan, Carlos |
Taille de l’image : | 5188 px × 3780 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |