Formation of earth

Our Enthusiastic Earth is very beautiful. 

We must know the Formation of our earth.

Let's see how the earth is formed?

Astronomers and planetary scientists have spent a lot of time conducting research to determine the genesis and evolution of planet Earth.

Knowing how our planet formed can help us better understand its structure and how itcame to be, but it can also shed light on howplanets surrounding other stars are formed.

At the beginning of the universe, Earth did not exist.In reality, only a little portion of theuniverse as we know it today existed when the universe first started 13.8 billion years ago.

To get to Earth, though, one must start at the beginning, when the universe was just beginning.

Hydrogen and helium were the only two elements present at the beginning, along with a little amount of lithium.

The hydrogen that was present gave rise to the first stars.

Generations of stars began to form in gas clouds after that process got going.

These stars produced heavier elements like oxygen, silicon, iron, and others in their cores as they became older.

The initial star generations dispersed after their deaths.

A protostellar object generated at its core. It wasn't yet a full star, but it was young, hot,and bright.

 As the dust and pebbles of the cloud were crushed together by gravity and motion, a disc of the same material swirled around it, growing hotter and hotter.

Eventually, the hot young protostar "turned on" and started fusing hydrogen and helium in its core. 

Birth of the SUN

Earth and its sister planets were birthed in the whirling, heated disc.

A similar planetary system had already evolved.

In reality, astronomers have observed similar events taking place in other parts of the cosmos.

The heated disc slowly got larger and more powerful as the Sun started to ignite its nuclear fires.

Planetary scientists call this settling process differentiation. It didn't just happen with planets, but also occurred within the larger moons and the largest asteroids. The iron meteorites that plunge to Earth from time to time come from collisions between these asteroids in the distant past. 

At some point during this time, the Sun ignited. Although the Sun was only about two-thirds as bright as it is today, the process of ignition (the so-called T-Tauri phase) was energetic enough to blow away most of the gaseous part of the protoplanetary disk. The chunks, boulders, and planetesimals left behind continued to collect into a handful of large, stable bodies in well-spaced orbits. Earth was the third one of these, counting outward from the Sun. The process of accumulation and collision was violent and spectacular because the smaller pieces left huge craters on the larger ones. Studies of the other planets show these impacts and the evidence is strong that they contributed to catastrophic conditions on the infant Earth. 

At one point early in this process a very large planetesimal struck Earth an off-center blow and sprayed much of the young Earth's rocky mantle into space. The planet got most of it back after a period of time, but some of it collected into a second planetesimal circling Earth. Those leftovers are thought to have been part of the Moon's formation story.

Volcanoes, Mountains, Tectonic Plates, are formed in the Earth.

The oldest surviving rocks on Earth were laid down some five hundred million years after the planet first formed. It ​and other planets suffered through what's called the "late heavy bombardment" of the last stray planetesimals around four billion years ago). The ancient rocks have been dated by the uranium-lead method and appear to be about 4.03 billion years old. Their mineral content and embedded gases show that there were volcanoes, continents, mountain ranges, oceans, and crustal plates on Earth in those days.

This process of settling is known as differentiation by planetary scientists. Not only did it occur within planets, but also within the biggest asteroids and larger moons.

These asteroids collided in the distant past, resulting in the iron meteorites that occationally strike Earth.

The Sun ignited at some point during this period.

Even though the Sun was only approximately two-thirds as brilliant as it is now, the ignition process (also known as the T-Tauri phase) was intense enough to blow away the majority of the protoplanetary disk's gaseous component.

The leftover pieces, pebbles, and planetesimals kept accumulating into a few big, stable entities with evenly spaced orbits.

Counting away from the Sun, Earth was the third of these planets.

Finally..Our Enthusiastic Earth is formed..  😍

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By Kavitha..☜