The Big Bang
Theory (big explosion) stated that approximately 15 billion years ago, all the
matter in the air together and condenses (condensing) form a shape that tapers.
Furthermore, the solid mass is shrinking exploded with a terrific explosion. The
dust and gas explosion results form new generations of stars. When this is the
estimated initial formation of the universe. Earth formed about 5 billion years
ago, and the first living things appeared on earth about 1 billion years later.
Based on the
Theory of the Big Bang, the formation of the earth originated from tens of
billions of years ago. At first there is a mist giant rotating on its axis.
Round these parts allows small and light thrown out and a big part gathered in
the center, forming a giant disc. One time, the giant mist exploded violently
in space which then formed the galaxies and nebulas. Over a period of
approximately 4.6 billion years old, these nebulae freeze and form a galaxy
called the Milky Way name, then form the solar system. Meanwhile, part of the
light thrown out earlier condenses to form clumps that cools and solidifies.
Then, the clumps that formed the planets, including the planet Earth.
During its
development, the planet continues to experience a gradual process to form it is
today. There are three stages in the process of formation of the earth, namely:
1.
Initially, the planet earth is still a homogeneous and has not experienced the
bedding or the difference elements.
2. Formation
of the earth's bedding structure that begins with the differentiation. Iron
material greater specific gravity will sink, while the lighter specific gravity
will move to the surface.
3. The Earth
is divided into five layers: inner core, outer core, the mantle, outer mantle,
and crust
There are
many other theories advanced by experts such as:
Buffon's
theory of the French natural scientist George Louis Comte de Buffon Leelere. He
argued that the ancient collision between the sun with a comet that causes
partial solar masses bouncing to the outside. This bouncing masses into
planets.
Theory
Weizsaecker where in 1940, C.Von Weizsaecker, the German astronomer suggested
the solar system initially consists of the mass of the sun surrounded by a
cloud of gas. Most of the mass of gas cloud is composed of light elements,
hydrogen and helium. Because the sun is very high, then the lighter elements
evaporate into space the solar system, while the heavier elements behind and
clumping. These clots will draw element - another element in space solar system
and further evolved to form planets - planets, including Earth.
The theory
put forward by Gerald Kuiper P.Kuiper argued that in the beginning there is a
large disk-shaped nebula disc. The center of the dish is a proto sun, while the
gas mass is rotating around the protoplanetary prosun. In theory, he also
incorporates elements - light elements, hydrogen and helium. Center disc is
protomatahari become very hot, while the protoplanetary be cool. Light elements
are vaporized and malia agglomerate into planets - planets.
Whipple's
theory by an American astronomer Fred L.Whipple, said at the beginning of the
solar system consists of gas and cosmic dust cloud that formed a kind of
rotating disc. The dust and gas rotating mass and the concentration causes
clumping eventually becomes solid, while the fog disappear evaporate into
space. Dense blobs collide and then form planets - planets.
In general,
the most popular up to now is the Big Bang theory and followed by many
scientists, although sometimes there are some differences.