Hypothetical origin of the Solar System

Nebula Hypothesis

Nebula hypothesis was first proposed by Emanuel Swedenborg (1688-1772),in 1734 and perfected by Immanuel Kant (1724-1804) in 1775. A similar hypothesis was developed by Pierre Marquis de Laplace independently in 1796. This hypothesis, which is better known as the Nebula Hypothesis Kant-Laplace, said that at the initial stage, the Solar System was still a giant fog. The fog was formed from dust, ice, and gas called nebulae, and the elements that most of the gas hydrogen. Which has the force of gravity causes it to shrink and the mist turned to a certain direction, the temperature of heated mist, and eventually became a giant star (the sun). Giant sun shrinking and spinning faster and faster, and the gas rings and ice flew around the sun. Due to gravity, these gases condense along with the decrease in temperature and form planets and planets in the outer. Laplace argued that the shape is almost circular orbits of the planets is a consequence of their formation.
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Hypothesis Star Twin

Twin star hypothesis originally proposed by Fred Hoyle (1915-2001) in 1956. The hypothesis suggests that our solar system was once two stars of similar size and adjacent to one of them exploding leaving small fragments. fragments would be trapped by gravity stars that do not explode and began surrounding.
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Condensation Hypothesis

Condensation hypothesis originally put forward by the Dutch astronomer named GP Kuiper (1905-1973) in 1950. Condensation hypothesis explains that the solar system formed from a giant ball spinning fog forming giant discs.

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Hypothesis Planetisimal

Planetisimal hypothesis was first proposed by Thomas C. Chamberlin and Forest R. Moulton in 1900. Planetisimal hypothesis says that our solar system formed as a result of another star passing close enough to the sun, in the early formation of the sun. The proximity is causing a bulge on the surface of the sun, and with the internal processes of the sun, pull the material over and over again from the sun. Star gravitational effects result in the formation of two spiral arms extending from the sun. While most of the material drawn back, others will remain in orbit, cooled and condensed, and became the objects of their small size and some planetisimal called big as the protoplanet. These objects collide from time to time and form the planets and the moon, while the remains of other materials into comets and asteroids.