What is the age of the earth? Detailed answer

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What is the age of the earth? Detailed answer

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What is the age of the earth?

We will never be able to give an exact answer to this question. Since time immemorial, man has been interested in the age of the Earth, and many myths and legends have appeared on this subject, which seemed to give an answer. But it was only about 400 years ago that this question began to be approached from a scientific point of view. At this time, it was proven that the Earth revolves around the Sun (in other words, that the Earth is part of the solar system), and now scientists knew where to start. From finding out the age of the Earth, what was needed was to explain how the solar system was born.

How did the sun and all the planets come about? One of the theories is called the nebular hypothesis. According to this theory, once upon a time a huge cloud of hot gas rushed through space, which decreased in size and heated up more and more.

As the gas cloud decreased, it threw out clumps of gas. Each of these clumps formed into a planet, and the remaining mass gathered in the center and became the Sun. Another explanation is called the planetesimal theory. According to it, millions and millions of years ago there was a huge accumulation of small solid bodies called planetesimals in space, with the Sun in the middle. A huge star passed nearby, under the influence of which parts of this mass came off. These parts attracted small planetesimals to themselves, just as snow sticks to a snowball, and so the planets appeared.

Regardless of the correctness of this or that theory, astronomers have calculated that this happened about 5 years ago! But not only astronomers, but also other scientists were engaged in solving this issue. They tried to find the answer by figuring out how many years it took the Earth to become what we know it to be. They determined the time it took for the oldest mountains to erode and the time for the oceans to accumulate their current amount of salt.

As a result of all studies, these scientists agreed with astronomers that the age of the Earth is approximately 5 years.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What is surge flood?

When a strong and prolonged western wind raises the water level in the narrow Gulf of Finland, the Neva turns back and floods St. Petersburg, located on a low coast. This is an example of a surge flood. The two biggest ones happened exactly 100 years apart: in 1824 (remember A. S. Pushkin's poem "The Bronze Horseman") and in 1924. The dam built in the bay saved the city of Petra forever from this disaster.

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