(ORDO NEWS) — An international and interdisciplinary team of experts has conducted a new study that explores in more detail the history of the origin of our solar system.
With the help of computer simulations, as well as laboratory tests, scientists were able to determine when the disappearance of the nebula that surrounded the Sun.
Astronomers say that the origin of the Sun as a protostar occurred more than 4.5 billion years ago. It arose in the very center of the nebula, which later fed on to become more massive.
Most of the existing stars do the same. Previous studies have shown that it takes a minimum of four million years for a protostar to “gain strength” by absorbing material present in its star.
During this time, the nebula gradually begins to dissipate. Scientists were interested in exactly when this nebula disappeared directly in our solar system.
In the course of the study, meteorites were carefully studied, which were found in 1977, 1978 and 2008 in Antarctica.
They consisted of primary material, which was called “carbonaceous chondrite”. It is generally accepted that this material appeared when the solar system was just beginning to form.
Meteorites from Antarctica are the same age as our planetary system, so if we analyze them, we can establish exactly what processes took place many millions of years ago.
Scientists began to study the magnetic fields of ancient space objects. They used a special method of laboratory analysis in order to establish the presence of “remanence”, which was provoked by the presence of a local field.
After that, the results of the study were compared with other studies of rocks and meteorites that arrived on our planet from outside the solar system.
All this demonstrated that in the inner part of the solar system, the nebula disappeared completely 3.7 million years after the system itself was born.
It took a little longer to clean the outside. It cleared up in 5.2 million years. The results obtained are in full agreement with the generally accepted theory.
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