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How old is planet Earth?

7 Answers
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The Universe was formed by what geologist call the Big Bang Theory. This was a cataclysmic explosion from an infinitesimally small point that all the energy and matter that is now known as the Universe was packed into. When the explosion happened the Universe was formed, according to current estimates the Universe is 13.7 billion years old.

Once the Universe was created our solar system was created from what is known as the Nebular Theory. This states that a nebula or a gaseous cloud formed from hydrogen and helium left over from the big bang, as well as other heavier elements that were produced by fusion reactions in stars.

Gravity from these stars pulls gas and dust inward to form an accretionary disk ( long thin disk). Eventually a glowing ball - the proto sun formed at the center of the disk.

The dust particles then collect with the ice particles from volatile materials( gases) collects to make rings around the proto-sun.

These ice particles and dust particles collide and stick together causing what is known as planetesimals or really small solid planet like structures.

The continuous collisions of ice and dust make the planetesimals gradually grow creating planets.

The high gravity from the proto-sun reshapes the planets into spherical balls.

Soon after the planet Earth is created it has a collision with a planetesimal forming a ring of debris around the Earth.

The Earth Gravity generated from the inner core pulls the debris together creating the moon.

Eventually the atmosphere develops from volcanic gases creating a shield from the radiation of space, allowing optimal conditions for life.

Isotopic dating from encountered meteorites here on Earth, thought to be from the planetesimal that had collided with earth consistently yield an age of 4.57 billion years old.

Thus, the Earth is 4.57 billion Years old!

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T

Planet Earth (sometimes referred to as: the world, the Blue Planet, or by the Latin name, Terra) formed approximately 4.54 billion years ago, and life appeared on its surface within one billion years.
The earliest material found in the Solar System is dated to 4.5672 ± 0.0006 bya, therefore, it is inferred that the Earth must have been formed by accretion aroun this time.

I hope this helped.

Source: en.wikipedia.org

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L

The Earth is hypothesized to have formed at the same time as the rest of the solar system. Meteorites that have fallen to Earth are hypothesized to have formed at the same time as everything else in the solar system and have been dated at 4.5 billion years old. Therefore it is thought that the Earth is 4.5 billion years old.

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A

It is theorized, based on radiometric dating, that the earth is about 4.6 billion years old.

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D

6.4 billion year old, give or take a few million years.

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H

Best guess for the age is 4.6 billion years

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G

My opinion nobody knows.

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