History of the Earth


History of the Earth

How old is our Earth?

Scientists believe that our Earth was formed approximately 4.54 billion years ago. About 14 billion years ago. There was a massive explosion, which the scientist later named “The Big Bang”. It released radiation, particles, and huge clouds of atoms, dust, and gas. Our Earth is believed to have been born as a result of this Big Bang.

 

Where in space is our Earth located?

Our Earth is located in a spiral galaxy named the ‘Milky Way’ which is a part of the solar system. The solar system also consists of the sun, the moon, the other seven planets and their moons, numerous comets, asteroids, and minor planets. The solar system was formed from a large, rotating cloud of interstellar dust and gas called the ‘Solar nebula’, orbiting the Milky Way’s galactic center. The solar nebula was composed of hydrogen and helium, created shortly after the big bang.

How did the earth form?

After the Big Bang, particles were floating around in space. The force of gravity pulled the particles together and they began to spin around a center. Some of the matter squeezed into a tiny fireball, which grew bigger and bigger, until to gave birth to Sun. The rest of the molecules kept spinning in a cloud of dust that was leftover from the formation of the Sun. In time, a few molecules clumped together. Then, the clumps began to crash into each other and stick together to make bigger clumps. Finally, there were huge clusters of metal and rock, hundreds of miles across, good enough to be called planets. One such cluster is our planet Earth. Its formation was largely completed over 10 - 20 million years.


DID YOU KNOW?

our home galaxy - the Milky Way
contains about 200 billion stars.
the solar system is located within one of the outer arms of the Milky
Way.


 what did the just-born Earth look like?

The just-born Earth was like a blurred patch of blistering rock and choking fumes. however, space was cold, so the Earth also began to cool down. approximately, 3,000 million years ago, the planet was cool enough for landmasses to form. the center of the planet was mainly melted iron. as time passed, the surface cooled to form the crust, which was mainly silica, and the steam condensed into water.


How did the Earth start orbiting the Sun?

The sun's gravity caught the Earth. as well as other planets, and pulled them into an orbit around the sun. On one hand, the Earth's momentum was always trying to carry it away from the sun in a straight line. On the other hand, the sun's gravity kept pulling the Earth toward the Sun. As a result, because of the centrifugal force, the Earth ended up orbiting the Sun in an elliptical path.


When is Earth farthest from the Sun?

The Earth is the farthest from the Sun around the first week of July, every year. The event is called Aphelion, and at this point, the distance between the Earth and the Sus is about 152 million km.


How far is the Earth from the Sun?

The Earth is the third planet from the Sun. It is situated at an average distance (the mean distance) of about 150 miles kilometers (93 million miles) from the Sun. However, the exact distance between Earth and the Sun varies with its positions in its elliptical orbit.


When is the Earth closest to the Sun?

The Earth is closest to the Sun around the first week of January, every year. The event is called Pergelion, and at this point, the distance between the Earth and the Sun is about 147 million km (91.3 million miles).

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