Earth formed billions of years ago, but the surface of the Earth has undergone many developments and changes in the process of all time. These changes are fast and slow. The cause of these changes is the force of the earth (Endogen) and personnel from outside the Earth (exogenous).
Earth is part of the galaxy in the universe, the Milky Way galaxy. Did you know what is called the galaxy? In the science of astronomy, galaxies defined as a system consisting of stars, gas and dust that are very broad, in which the members have the force of attraction (gravity). Earth that we live only a small part of the Milky Way galaxy, which is part of the solar system with the sun as its center.
Milky Way is not the only galaxy in this universe. The total number of galaxies that can be photographed with a diameter telescope at the Observatory 5m Hale possible up to approximately one billion galaxies. These galaxies fill the universe.
1. Fog theory Kant-Laplace
Since the time before Christ, the experts have a lot of thinking and conduct an analysis of the phenomena of nature. Start the 18th century scholars have been thinking about the process of the Earth. Do you remember about the theory of cloud (nebula) put forward by Immanuel Kant (1755) and Pierre de Laplace (1796)? They are famous for fog Kant-Laplace theory. In this theory proposed that in the universe there is gas which is then assembled into mists (nebulae). Style of attraction between these gases form a very large collection of fog and spin faster and faster. In the process of this rapid turnover, the material parts of the equatorial haze thrown separated and solidified (for cooling). The part is then thrown into the planets in the solar system.
Earth is part of the galaxy in the universe, the Milky Way galaxy. Did you know what is called the galaxy? In the science of astronomy, galaxies defined as a system consisting of stars, gas and dust that are very broad, in which the members have the force of attraction (gravity). Earth that we live only a small part of the Milky Way galaxy, which is part of the solar system with the sun as its center.
Milky Way is not the only galaxy in this universe. The total number of galaxies that can be photographed with a diameter telescope at the Observatory 5m Hale possible up to approximately one billion galaxies. These galaxies fill the universe.
1. Fog theory Kant-Laplace
Since the time before Christ, the experts have a lot of thinking and conduct an analysis of the phenomena of nature. Start the 18th century scholars have been thinking about the process of the Earth. Do you remember about the theory of cloud (nebula) put forward by Immanuel Kant (1755) and Pierre de Laplace (1796)? They are famous for fog Kant-Laplace theory. In this theory proposed that in the universe there is gas which is then assembled into mists (nebulae). Style of attraction between these gases form a very large collection of fog and spin faster and faster. In the process of this rapid turnover, the material parts of the equatorial haze thrown separated and solidified (for cooling). The part is then thrown into the planets in the solar system.
2. Planetesimal theory
A century after the fog theory, appear planetesimal theory proposed by Chamberlin and Moulton. This theory has revealed that at first there is the sun of origin. At one point, solar origin is approached by a large star, which caused the withdrawal of the sun. Due to the withdrawal of solar energy from earlier, there was a great explosions. The gas explodes out of the sun's atmosphere, then condenses and freezes as solid objects, and called planetesimals. Planetesimal is in its development into the planets, and one of them is our planet Earth.
Basically, the theoretical processes of the planets and the earth, starting with a temperature gaseous daribenda very hot. Then, because the process time and the rotation (centrifugal) fast, then the cooling occurs that causes compaction (on the outside). Adapaun Earth's inner body temperature is still high.
3. Tidal Theory of Gases
Tidal theory is put forward Leh Gas jeans and Jeffreys, namely that a large star near the sun in a short distance, causing the body tides on the sun, when the sun was still in a state of gas. The occurrence of the tides that we know on Earth, size, very small. The reason is the small mass of the moon and the distance of the moon to Earth (60 times the radius of Earth's orbit). However, if a star of mass almost as large as the sun approached the sun, it will form a kind of giant waves mountains on the sun's body, caused by an earlier star attraction. Mountain-guung will reach extremely high and formed a huge glowing tongue, protruding from the mass of the sun earlier and stretch towards the big star.
In this hot tongue occurs refinement gases and finally the columns will be split, then split into separate bodies, namely the planets. Big star that caused the withdrawal of the body parts of the sun above, continue the journey in the universe, so that will gradually lose its influence on the earlier-shaped planet. The planets will revolve around the sun and experience the process of cooling. This cooling process will be slow on large planets, like Jupiter and Saturn, while the small planets like our Earth, runs relatively faster cooling.
While the cooling progresses, the planets were still around the sun in elliptical orbits, so it is probable that at some point they will approach the Sun within a short distance. Due to the withdrawal strength of the sun, there will be ups and downs on planetary bodies of the new born. The sun will draw material from the columns of the planets, so was born the months (satellites) that revolve around the planets. Sun held the role in shaping these months in principle the same as a big star role in shaping the planets, as has been discussed above.
A century after the fog theory, appear planetesimal theory proposed by Chamberlin and Moulton. This theory has revealed that at first there is the sun of origin. At one point, solar origin is approached by a large star, which caused the withdrawal of the sun. Due to the withdrawal of solar energy from earlier, there was a great explosions. The gas explodes out of the sun's atmosphere, then condenses and freezes as solid objects, and called planetesimals. Planetesimal is in its development into the planets, and one of them is our planet Earth.
Basically, the theoretical processes of the planets and the earth, starting with a temperature gaseous daribenda very hot. Then, because the process time and the rotation (centrifugal) fast, then the cooling occurs that causes compaction (on the outside). Adapaun Earth's inner body temperature is still high.
3. Tidal Theory of Gases
Tidal theory is put forward Leh Gas jeans and Jeffreys, namely that a large star near the sun in a short distance, causing the body tides on the sun, when the sun was still in a state of gas. The occurrence of the tides that we know on Earth, size, very small. The reason is the small mass of the moon and the distance of the moon to Earth (60 times the radius of Earth's orbit). However, if a star of mass almost as large as the sun approached the sun, it will form a kind of giant waves mountains on the sun's body, caused by an earlier star attraction. Mountain-guung will reach extremely high and formed a huge glowing tongue, protruding from the mass of the sun earlier and stretch towards the big star.
In this hot tongue occurs refinement gases and finally the columns will be split, then split into separate bodies, namely the planets. Big star that caused the withdrawal of the body parts of the sun above, continue the journey in the universe, so that will gradually lose its influence on the earlier-shaped planet. The planets will revolve around the sun and experience the process of cooling. This cooling process will be slow on large planets, like Jupiter and Saturn, while the small planets like our Earth, runs relatively faster cooling.
While the cooling progresses, the planets were still around the sun in elliptical orbits, so it is probable that at some point they will approach the Sun within a short distance. Due to the withdrawal strength of the sun, there will be ups and downs on planetary bodies of the new born. The sun will draw material from the columns of the planets, so was born the months (satellites) that revolve around the planets. Sun held the role in shaping these months in principle the same as a big star role in shaping the planets, as has been discussed above.
4. Twin Stars Theory
Twin Star is the theory put forward by an expert Astronomy RA Lyttleton. According to this theory, galaxies come from a combination of a binary star. One star exploded so much material that was thrown. Because the star that exploded not have the force of gravity is still strong, then the fractional distribution of stars surrounding the star explosion that did not explode. Stars that do not explode it is the sun, while the fraction of stars are the planets that surround them.
Twin Star is the theory put forward by an expert Astronomy RA Lyttleton. According to this theory, galaxies come from a combination of a binary star. One star exploded so much material that was thrown. Because the star that exploded not have the force of gravity is still strong, then the fractional distribution of stars surrounding the star explosion that did not explode. Stars that do not explode it is the sun, while the fraction of stars are the planets that surround them.
5. Big bang theory
This theory is based on the assumption of a very large mass and has a very large density. The existence of nuclear reaction caused great amssa exploded. The mass is then expanding very fast, away from the center of the explosion. Because of gravity, the star of the most powerful will be its center of gravity.
Of the various theories put forward by experts, most scientists support the big bang theory. According to them, a large explosion was the initial formation of the universe.
This theory is based on the assumption of a very large mass and has a very large density. The existence of nuclear reaction caused great amssa exploded. The mass is then expanding very fast, away from the center of the explosion. Because of gravity, the star of the most powerful will be its center of gravity.
Of the various theories put forward by experts, most scientists support the big bang theory. According to them, a large explosion was the initial formation of the universe.
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