Scientists have found the oldest object on Earth that is older than our solar system!

Mahirnur
3 min readSep 1, 2020

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Suppose you are walking down the street. He stumbled on a piece of rock. Out of curiosity, he discovered that one of the elements in the rock was older than the solar system beyond the earth! Isn’t the matter spooky?

Recently, something like this has been found on the Earth’s surface, which is hundreds of millions of years older than our solar system! Scientists have found very small microscopic dust particles that are thought to be between 5 and 6 billion years old. But our sun is only 4.6 billion years old. The question is how did these tiny particles come to earth? Very simple answer, meteor showers occur in different parts of the world at different times. This article has been rescued from a meteor-like this.

“It’s one of the most exciting researches of my life,” said cosmologist Phillip Heck, who works in the Museum of Natural History at the University of Chicago. “This is the oldest metallic substance found on Earth that gives us an idea of ​​how the inner stars of the galaxy were formed,” he added.

Of course, such mysterious old objects have been seen before coming to Earth through meteors. However, they are so delicate and complex that they stick deep into the rock and are hard to find. These granular substances are called “Presolar Grains”. One such meteorite was found to carry “Presolar Grains” (Presolar Grain is all the interstellar dust particles that used to travel in space before the formation of our Sun).

The meteorite, called Murchison Meteorite, weighed 100 kilograms. In 1979, the Australian Murchison exploded in the skies. The Field Museum housed about 52 kilograms of Murchison Dust. Scientists have been experimenting with it for a long time. Inside the meteorite were huge amounts of microscopic minerals called silicon carbide. The presence of these objects confirms that they are interstellar and presolar in other words! However, at that time in 1990, it was difficult to find out the exact age of them and the equipment was not modern.

These silicon carbides were separated from meteors in the 1990s. The meteorite is crushed into a powder and acid is added to remove the silica. But in the absence of modern equipment, microscopy, scientists have to get special speed. They could not properly analyze the grains then.

So Heck and his team decided to go through as many analytical tests as possible of the obtained granules and come up with a result. He uses scanning electron microscopy, secondary ion mass spectrometry, and noble gas mass spectrometry, which can detect granular silicon carbides inside meteorites by radiating a kind of cosmic ray. The longer this cosmic ray or cosmic ray reacts, the more silicon carbide is produced and visible.

Heck compares the fact that if you put a bucket in the rain if the amount of rainwater is constant here, the bucket will be full of water as long as you keep the bucket. In the same way, silicon carbide will continue to be visible as long as the radiation continues. A total of 40 fine granular silicon carbides were identified.

These include the neon-3 and helium-21 isotopes that will determine their age. Some of the grains are about five and a half billion years old and most are 4.8 to 4.9 billion years old. That is equal to the age of my sun! This experiment gives us an idea of ​​how the inner stars of our Milky Way were formed.

The star from which they were formed was formed about 6 billion years ago During the last days of the evolution of the stars, various substances were released into space in a condensed state, and the dust particles were a part of them.

It later took up space on the Murchison meteorite somehow and reached our Earth after wandering like this for a long time. Heck added: “These studies and discoveries give a clear idea of ​​the evolution of stars. Some people think that the formation/birth of a star is constant, that is, for a certain period of time. But these granules prove that stars were born and evolved at different times. And that is the main achievement of the search. “

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