Carbonia (Carbon planets)

==Description==
Carbonia(Carbon planets) - is a theoretical type of planet that contains more carbon than oxygen.
==General characteristics==
Such a planet would probably have an iron-rich core like the known terrestrial planets. Surrounding that would be molten silicon carbide and titanium carbide. Above that, a layer of carbon in the form of graphite, possibly with a kilometers-thick substratum of diamond if there is sufficient pressure. During volcanic eruptions, it is possible that diamonds from the interior could come up to the surface, resulting in mountains of diamonds and silicon carbides. The surface would contain frozen or liquid hydrocarbons (e.g., tar and methane) and carbon monoxide. A weather cycle is theoretically possible on carbon planets with an atmosphere, provided that the average surface temperature is below 77 °C.
However, carbon planets will probably be devoid of water, which cannot form because any oxygen delivered by comets or asteroids will react with the carbon on the surface. The atmosphere on a relatively cool carbon planet would consist primarily of carbon dioxide or carbon monoxide with a significant amount of carbon smog.
==Appearance==
The surface of carbon planets is dark and reddish from hydrocarbon deposits. Carbonia can be completely different sizes
File:Carbon-Planet-1.jpg|Artist's concept of a carbon planet.
File:Carbon-Planet-2.jpg|Carbonia in Space Engine(Rodrigos Mod)
==On Space Engine==
Life on carbonia is possible. In Space Engine, carbon planets are the rarest type of planet. Like ferria, aquaria and terra - carbonia can contain water on the surface. Oxygen can also be found in absolutely any amount in the atmosphere. Although very rare, it is possible to find marine carbonia with multicellular terrestrial and marine life. Perhaps marine carbonia are easier to find in small galaxies, such as Pegasus dSph. In real life, carbon planets could be the first planets in the universe where life could have originated. 
#https://en.wikipedia.org/wiki/Carbon_planet
#https://astronomy.com/news/2016/06/universes-first-life-might-have-been-born-on-carbon-planets
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