Creation of Solar System

People see the fact that the sun surrounded by planets that orbit planets form close to circular shape and trajectory almost coincide. Directions of the circulation of all the planets are the same that is opposite to the direction of clockwise rotation, if we look at the North Pole. The revolution of planets turns toward similar to the direction of rotation of the sun. More than that, most of the planet's rotation and satellite-satellite is also the same direction. Such direction is also called a negative direction. Direction of motion of celestial bodies in the opposite direction is called a positive direction, such as the circulation direction of the sun, rises from the east, then up, and then sets in the west. Daily circulation as well as stars and moon, if we observe from earth.The fact that, astronomers and physicists use the law for a rotating object to analyze current events in nature. Therefore, could be drawn a conclusion, that the solar system formed from primordial material which rotates like the above, the negative direction. Although in reality, there are deviations from the direction of rotation direction of the public.          

 Several theories about the solar system are as follows :

1)      Nebulae Theory (Kant and Laplace)

Immanuel Kant (1749 - 1827) a German philosopher to make a hypothesis about the solar system. Say that the universe there is mist that slowly rotates. The center of the fog that gradually turned into a blob of gas that later became the sun and the fog surrounding the planets and their satellites.

At the same time, without any communication, a French physicist named Pierre Simon de Laplace put forward a similar theory. Say, that the solar system originated from the spiral heat haze. Because the torsion forms of fog, which forms a round shape like a big ball? Increasingly smaller ball, the quicker the wrench. Consequently, the shape of the ball meme pats the poles and widens at the equator, and even then most of the mass of gas at the equator moved away from the blob core, forming rings. Eventually bracelets turned into dense clumps. That is what is called the plant and its satellites. Whereas the core part of the fog was still shaped incandescent gas that we see as the sun today.

The second theory has the equation of material origin, namely fog. That is why, both made in one name, namely the theory of nebulae (nebular hypotheses), even more in the know theories of Kant and Laplace.

2)      Planetisimal Theory (Moulton and Chamberlin

Thomas c. Chamberlin (1843-1928) a geologist and Forest R. Multon (1872-1952) an expert in astronomy, two American scientists. Theory known as the planetisimal theory (meaning small planet) because the planets formed from solids that are already there.

According to this theory, the sun has been there as one of the stars that much. At a time, there is a passing star at a distance that is not too far away. As a result, there was a high tide event on the surface of the sun and stars. Most of the mass of the sun are drawn to the stars.

At the time the star moved away, according to Moulton and Chamberlin, most of the mass of the sun it falls back to the surface of the sun and partly dispersed into space around the sun. This is what the call planetesimal which later became the planets and circulated in its orbit.

                   3)      Tidal Theory (Jeans and Jeffreys)

Planetesimal theory was almost identical to that in the tidal theory put forward by Sir James Jeans (1877-1946) and Harold Jeffreys (1891) British scientists.
Jeans and Jeffreys describe that after the star had passed the mass of the sun off the cigar shape formation that juts toward the star. Then, due to a more distant star, the mass of the cigar discontinuous and forms a mass of gas in the vicinity of the planets. This theory explains why the planets in the middle, like Jupiter, Saturn, Uranus and Neptune are giant planets, while at the end of Mercury and Venus near the Sun and Pluto at the other end is a smaller planet.

4)      Dust Cloud Theory (von Weizsaecker)

In 1940 a German astronomer named Carl von Weizsaecker developed a theory known as the dust cloud theory. This theory is then refined again by another astronomer, namely Gerard P. Kuiper (1950), Subrahmayan Candrasekhar, and others.
Basically, this theory suggests, that the solar system was formed from clouds of gas and dust. In the universe scattered clouds like that. More than 5000 million years ago, one of the clouds that have compression. In the compression process that dust particles are attracted to the center of the cloud, forming lumps the ball and start twisting. Over time clumps of gas that flattened disc-like shape that thick in the middle and thinner at the edges. The center of the spiral disk of gas more slowly than the edges. The particles in the center of the disc is then pressed together, causing heat and becomes incandescent. This section then becomes the sun.
Outer part of a more fragmented into many clumps of gas and dust are smaller. Blob is then frozen and became the planet and its satellites. Materials on the call proto-planet the planet, so this theory also called theory of proto-planets.