Formation of Solar System and Evolution of Earth

Running head: FORMATION OF SOLAR SYSTEM AND EVOLUTION OF EARTH
Formation of Solar System and Evolution of Earth
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1FORMATION OF SOLAR SYSTEM AND EVOLUTION OF EARTH
The Solar System refers to planetary system of Sun which is gravitationally bound and
the objects that orbit around the Sun. There are various objects that orbit Sun directly of which
the largest are eight planets. The objects which orbit the Sun in the indirect manner are moons.
Solar System was formed from gravitational collapse of the molecular clouds (Banerjee et al.
2016). This essay throws light on how the Solar System was formed. The essay also talks about
the evolution of Earth as planet.
Around 4.5 billion years ago, gravity was responsible for pulling the cloud of the dust
along with the gas together that helped in the formation of the solar system. The massive
concentration of the interstellar gas along with the dust was responsible for creating the
molecular cloud that formed the birthplace of the Sun (Pfalzner et al. 2015). The cold
temperature made the gas in clumping together that growed denser gradually. The dense part of
the cloud started to collapse under the own gravity that helped in the formation of the stellar
objects which was known as the protostars. The gravity collapsed material into that of infant
object that gave rise to the star from where the planets would be born.
It was brought out in recent times that the planets were bound in that of near-circular
objects and it was in a much more compact form as it is in the present age. There was a large
disk of the rocks along with the ice that surrounded them that stretched around to around 35
times of the distance in between the Earth and the sun. This was the Nice model as it was
discussed in city of France in the year 2005 (Förstel et al. 2016). The grains that condensed
within the solar nebula joined to form larger chunks. The interaction of planets with smaller
bodies scattered them towards sun. This process traded energy with objects that send Saturn,
Neptune along with Uranus into that of solar system. Small objects were able to reach Jupiter
that made them fly to edge of solar system. The movement that took place in between the planets
Jupiter along with Saturn was responsible for driving Uranus along with the Neptune into the
eccentric orbits (Martin and Livio 2016). The material was flung in the inward direction and it
crashed into that of terrestrial planets at the time of Heavy Bombardment. There was other kind
of material that was hurled in the outward direction that led to the formation of Kuiper Belt. In
the event of moving in the outward direction, Neptune along with Uranus traded the places. The
interactions with that of remaining debris caused the planets to settle into the circular paths when
they reached current distance from sun (Schiller et al. 2017).