Scientists have found what is believed to be the oldest solid material ever discovered, which is a piece formed about 7 billion years ago, and researchers described the discovery as “solid samples of stars” or “real star dust”, which is even older than the sun in our solar system Billions of years, but although it is older than any other solid known to mankind, it reached Earth only 50 years ago when it fell with a meteorite.
Solid specimen from star dust
According to Sky News, scientists believe that this cosmic dust was confined to a rock meteorite, found in the Field Museum in Australia, a huge hit our planet for half a century, and in addition to this discovery, scientists were able to find a crater for a giant meteorite that struck Earth before 800 A thousand years ago, which could lead to the discovery of other parts of the cosmic dust.
This ancient stellar dust was reached by Earth by the “Mortchison” meteorite, which is a huge 100 kilogram meteorite that fell near the Mortchison area in Victoria state in Australia on September 28, 1969.
In a recent study published in the Proceedings of the National Academy of Sciences, new researchers reported that a new analysis of dozens of dust grains in the pre-planetary period of the Mortchion meteorite revealed a group of different ages, ranging from approximately 4 million years and older than our sun, which was formed 4.6 One billion years, and another as old as 7 billion years, which is 3 billion years more than our sun.
This is one of the most exciting studies that I have worked on … This is because these are the oldest solid materials ever present, and they tell us how stars formed in our galaxy … They are samples, Solid stars, or true stellar dust. ”
The materials examined in the study were called “granular minerals formed before the birth of the sun,” according to the British newspaper The Independent.
It is noteworthy that the particles of astral dust are small and rare, and they are only present in about 5 percent of the meteorites that fell to the ground.
The stellar dust granules were isolated from the Mortchison meteorite, used in this study, about 30 years ago at the University of Chicago, and the process involved crushing the meteorite fragments and turning them into powder.
“Once all the pieces have been separated, it becomes paste, has a permeable property, and then it is melted with acid, until only the astral dust grains remain,” said graduate student at the Museum of Field and University of Chicago and co-author Jenica Greer.
Once the stellar dust granules were isolated, the researchers were able to find out which of these stars the granules came and how old they were, by measuring the number of new elements producing cosmic rays in them.
Scientists have found that most of the granules are between 4.6 and 4.9 billion years old, some of them greater than 5.5 billion years old, and researchers note that 7 billion years ago, abundant numbers of new stars were forming.
“There was a time before the solar system started when stars were formed,” Professor Heck explained.