Venus is earthly neighbour, its surface atmosphere is very tremendous, it is the close hundredfold of earthly surface atmosphere, we from outside aerospace sees Venus, see the earth's surface that is less than it completely, basic it is a heavenly body that is lapped by the aerosphere of grey yellow, so is Venus gaseous planet?
The bulk of Venus and quality are great without the earth still, 88% what bulk is equivalent to the earth, 80% what quality is equivalent to earthly quality, however its aerosphere total mass is equivalent to the earth however 93 times the left and right sides (earthly atmosphere total mass is 100 trillion tons about) , ply is thicker than earthly aerosphere also about 50 kilometers, air pressure of the surface is gotten high breathtaking, we know the fetal internal pressure of the car is 2.5 atmosphere about, the fetal internal pressure of the truck is 13 atmosphere roughly, however atmosphere of Venus the earth's surface is as high as about a hundred atmosphere, be equivalent to earthly ocean about 900 meters of pressure in, so that the air of its surface becomes very ropy, physical ability of certain even gas is pressed into liquid state, it may be said is gotten high unusual, so can we maintain Venus to be gaseous heavenly body by right of these conditions?
There are 8 major planets in our solar system, but come up from sort say to be able to be divided it is two kinds. Similar earth such planet that has rock face is called cliff qualitative planet or terrestrial planet, so look from this definition, without doubt Venus is to belong to cliff qualitative planet, because Venus is having cliff qualitative face, mercurial, earth, spark and it belongs to terrestrial planet, but resemble Jupiter, saturn, uranus and Neptune such heavenly body, as a result of their itself aerosphere particularly grumous, nethermost gas (hydric) be pressed into the liquid (liquid state hydrogen) , so that do not have rock surface, so this kind of planet is called again gaseous planet, perhaps be called Jovian planet.
Differentiate so a heavenly body belongs to gaseous planet, want to see it have cliff qualitative face, the atmospheric pressure of Venus surface is very high, but unapt still will hydric such gas is pressed into liquid state to cover a heavenly body apparently, so it still is not gaseous planet.
The quality of gaseous planet is normally greater, for instance the quality of Jupiter is 318 times of the earth, the quality of the aerosphere of smooth Jupiter was equivalent to 3 earths (earthly quality makes an appointment with 100 million tons 60 trillion) , the gravitation of Jupiter becomes hydrogenous atmospheric pressure easily liquid state hydrogen, the part is pressed into metallic hydrogen again below liquid state hydrogen, the internal ability of metallic hydrogen is cliff qualitative kernel. So Venus is expressed although the pressure of the face is very big, but get than be being differred with Jupiter photograph too far.
Actually solar system 14.5 times the quality of the Uranus with the smallest quality in 4 gaseous planets also is the earth, its in-house pressure should compare the pressure that has the face to still be gotten greatly much, think gaseous planet is a kind of celestial body with larger quality of more qualitative than cliff planet commonly so.
So to what level ability does the quality of cliff qualitative planet become gaseous planet greatly? Do not have exact numerical value at present actually, astronomer people once thought through computation the 3 times heavenly body at earthly quality can become gaseous planet commonly, but have a 7 times planet at earthly quality to remain cliff qualitative planet through astronomical observation hair later, be forced to think cliff qualitative planet and the quality end that enrage voice planet are not apparent so.
