Carbon planet, also known as diamond planet, is a hypothetical existenceterrestrial planetIt has a diamond inner layer with a thickness of tens of kilometers.This theory was first proposed by Marc Kuchner. These diamond planets can be produced in the protoplanetary disks of many starsCarbon elementAnd lack of oxygen, their evolution will beearth、VenusandMarsThese mainly silicon oxide planets are quite different.Such a planet may be liketerrestrial planetSame, rich inironorsteelOfcore, surrounded bysilicon carbideandTitanium carbideThe local letter of.On the top, it's a floorgraphiteFormalcarbonIf there is enough pressure, the lower layer may be several kilometers thickDiamonds。When a volcano erupts, diamonds are likely to erupt from the inside to the surface, forming a mountain of diamonds and silicon carbide.The surface may also be frozen or liquidhydrocarbon, likeTar、methaneandcarbon monoxide。
Carbon planets are predicted to be similar in diameter and mass to those of silicon and water, which may make it difficult to distinguish them.The geological characteristics similar to the earth may also appear, but the distance has different composition.For example, rivers may be composed of oil.If the temperature is low enough (below 350K), the gas can be photochemical synthesized into long-chain hydrocarbons and fall on the surface with rain.
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PulsarPSR 1257+12It may be interrupted in the carbon synthesis stage and form carbon planet stars.Carbon planets may also exist inGalactic coreNearby or orbiting a galaxyGlobular clusterThe stars in these places have more carbon than the sun.When stars die of old age, they will eject a lot of carbon.As time goes by, more stars will die of old age, and the concentration of carbon and the number of carbon planets will increase.NASAThe ability to search for such planets, calledTPFThe task ofHubble Space TelescopeA larger orbital observatory.The spectrum of carbon planet lacks the spectral line of water, but it will show carbon containing substances, such ascarbon monoxideThe exists of.
In August 2011, AustraliaSwinburn University of TechnologyOfMatthew BailesAnd his team's expert report,Millisecond pulsarPSR J1719-1438It may be accompanied by a planet squeezed to a very small size, and it may be a large solid diamond.They deduced the companion around the pulsar according to the gravitational pull.Further research shows that although the planet is very small (60000 miles in diameter, or five times the size of the Earth), its mass is slightly larger than Jupiter.The high density of the planet provides the team with a clue that carbon and oxygen may form crystals in the form of elements.In theory, however, the planet should have evaporated its outer layerWhite dwarfCompanion, leaving only the remains of the inner core.According to the definition of carbon planet, it does not meet the conditions, but should still be a star.According to current theory, these carbon planets will have rich iron coresterrestrial planetSimilarly, the upper layer of the core consists of very thick silicon carbide and titanium carbide, followed by a carbon layer. These carbon elements will exist in the form of graphite. If the planet is large and has enough pressure, diamonds can be squeezed out of the bottom of the carbon layer.The surface of a carbon planet will be filled with hydrocarbons andcarbon monoxideIf there is water, they have a better chance to breed life. But in such an environment, the "organic" standard will replace carbon with oxygen. These creatures will eat oxygen rich food and breathe carbon rich air.
In October 2012,Cancer 55eWas declared to have evidence of carbon planets.Its mass is 8 times that of the earth and its radius is 2 times that of the earth.Nikku Madhusudan，A researcher from Yale University reported on the results published in the Astrophysical News that the planet's temperature is 3900F - the surface is covered with graphite and diamonds, not water and granite.It goes around every 18 hours55 Cancri once.
AroundPulsarThe planet at the revolution of PSR 1257+12 may be a carbon planet, which may be generated by the carbon element generated by the old star and then by the supernova explosion.Other stars that may have carbon planets are expected toGalaxyThe center of thefixed starIt will also have enough carbon.
Note: This kind of planet is not confirmed to be found, and it is caused byMarc KuchnerA planetary model proposed in stellar theory.But the planet was discovered on August 25, 2011PSR J1719-1438 b, andCancer 55eThis kind of planet is suspected.
