Formation of earth dates occurred
4.6 billion ago. The dense cloud, compressed due to gravity, grew
immensely hot and heavy in the center. This became the Sun. The matter
on the outskirts of this nebula was pushed outward into space due to the
force of solar winds. This matter aggregated through gravity and
coalesced into what are called proto-planets and potential moons. This
is how Earth is formed because the third proto-planet from the Sun was
Earth.
The earth wasn’t always a
magnificent blue marble, with colorful trees rustling in the gusts,
with impeccable white sand beaches onto which green waves and foam lapse
and disperse into each other. With its vacillating oceans and laconic
mountains suffused with green, white and brown, inciting equanimity in
us.
Later, we erected grandiose domes
and numinous cathedrals, glass armored skyscrapers soaring high into
the stainless sky. We drove copious cars, omnibuses and trains, the
reminders of our mechanical routines, towards nowhere. There is a surge
of people, tumultuous, bustling on platforms and in the streets. Life.
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| How Was The Earth Formed? |
Earth actually started out as a hot,
lifeless, sturdy rock, constantly buffeted by comets and meteorites for
half a billion years. With volcanoes intermittently vomiting molten lava
and beings, if any, perishing under the sun’s scorching rays. Rewinding
even further, it seems that the planet emanated from sputtered
particles and gas that came together under the inescapable lure of
gravity.
The Core Accretion Scenario
Around
4.6 billion years ago, the larval solar system was a hot soup of dust
and gas whirling around haphazardly in space. This vagrant matter
is believed to have been produced in a supernova. As this nebula
contracted, the matter rotated faster, like an ice skater pulling his
hands inward. The nascent solar system thus contracted and flattened
into a disk.
Formation of earth
dates occurred 4.6 billion ago. The dense cloud, compressed due to
gravity, grew immensely hot and heavy in the center. This became the
Sun. The matter on the outskirts of this nebula was pushed outward into
space due to the force of solar winds. This matter aggregated through
gravity and coalesced into what are called proto-planets and potential moons. This is how Earth is formed because the third proto-planet from the Sun was Earth.
The proto-planets were not only too small, but also far too hot, to keep
hold of the volatile gases that were abundant in the nebula: hydrogen
and helium. This is why terrestrial planets (Mercury, Venus,
Earth and Mars) are composed of metals or silicate mantles. The
atmospheres of these planets are either extremely thin or absent
altogether.
