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Formation of the Solar System and Subsequent Evolution of the Earth
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Introduction
Understanding the basic principles behind the evolution of Solar System has always remained
the lucrative domain of laboratory and te
estrial researches. Several hypothesis and assumptions
has been made in past considering the probable evolution methods of the solar system.
Estimation about the origin of sun and its other o
iting planets in past has remain confined to
the preemptive assumption of the scientists and researchers, who has use the traditional tools and
mathematical formulas to predict the actual reason behind the evolution of solar system and
formation of Sun and Earth like stars and planets. In ancient time these te
estrial objects has
acquired mythological values which over time gradually changed in the consideration to system
of heavenly bodies constituted of planets, stars and other celestial bodies made up of gases,
ocks, and various types of elements, formed in duration of billion of years.
Continuation of researches in the respective field of science (Astronomy) has evolved
various kinds of new theories and hypothesis which has induced the adoption of new information
and re-evaluation of the age old theories, with respect to the cu
ently known information. There
exists high degree of variances in the traditional and modern approach of evaluation of origin of
solar system and its respective characteristics, thus comprehensive analysis of the subject should
have to be based on consideration to each and every aspects of acquired and established data or
observations. As like evolution of solar system there exist several theories related to the
formation of unique te
estrial planet of the solar system, i.e. Earth.
It is the only planet of the solar system which has developed characteristic changes to
adhere with the essential requirements of sustaining life at planet. Its uniqueness in kind has
generated the huge interest of astronomers and researchers to find out the actual circumstances
which has helped in formation of such planet, which supports existence of life. To assimilate the
comprehensive details of different theories and hypothesis of evolution of solar system and earth
an analytical approach to various evolution principles is made in this paper.
Theories and Hypothesis of Solar System Evolution
To understand the own solar system characteristics and its evolution situations most of
the researchers and astronomers has propounded different theories and hypothesis in
consideration to the facts known for respective features of solar system. It has been the sere
consideration factor of them which reflects that these specific features of solar system has ability
to project the direct outcome that how solar system was evolved. A
ief outline of the observed
and established facts can be presented as: (CliffsNotes.com)
 Most of the planet o
its exist in single and flat plane. (Pluto, an exception)
 Same plane also consist the Sun’s rotational equator.
 Direct motion of the sun and all planets is in same direction of west to east.
 Most of the planetary o
its are circular in nature. (Pluto and Mercury are exception of it)
 Sun and the planets generally rotates with a tilt position in o
ital and equatorial planes,
which generally termed as obliquities. (Pluto, Venus and Uranus are exceptions)
 Planets have regular space in solar system, which generally expressed with help of
mathematical progression: Bode’s Law.
 Planets are considered to be containing of maximum angular momentum (almost 99.8%),
however the sun is considered to ca
ying the maximum mass of the solar system (almost
99.8%.
 Chemical composition of planets also varies through the system, as metal-rich, dense
planets are located close to the sun while Hydrogen-rich, giant planets generally exists in
farther part of the solar system.
Considering such facts several related theories and hypothesis has been developed, which can be
described as: The nebular hypothesis and the runaway star hypothesis.
The Nebular Hypothesis
The nebular hypothesis, which is also known as the condensation theory or planetesimal
hypothesis, propounds that the in its initial phase the material constituting the solar system was
existant in the form of diffused large clouds consisted of dust...