A group of international scientists from Germany and Spain concluded that at least two mass extinction occurred in the history of the world due to the close explosions of Supernova. The study was published scientifically magazine Monthly notifications of the Royal Astronomy Association (MNRAs).
Supernovov’s explosions are one of the most powerful phenomena in the universe. If such a star explodes near the ground, this can lead to the destruction of the ozone layer that will increase the level of ultraviolet radiation. Disaster may also cause acid rain and the spread of heavy elements.
The team focused on extinction (372 million years ago), Ordovica (445 million years ago) and the late Nedevon (372 million years ago). The first destroyed about 60% of the sea invertebrate, and the second led to the disappearance of 70% of each species, including significant changes in the composition of fish.
Both events coincide with the supernova explosions near the Earth.
The researchers carried out the “census ın of the big stars in the 3260 light year radius from the sun. They examined the distribution of OB stars (large and short -lived) and calculated the frequency of the supernova explosions near the Earth.
The team found that the frequency of Supernova explosions in the radius of 65 light years from the Earth coincided with the frequency of mass extinction caused by external factors.
Today, only two stars – Antares and Betelheze – can be supernova in the next million years. However, both of them are more than 500 light years away from the world, which is very far from the world, which is far from the computer modeling, according to computer modeling.
Previously, scientists They called The biggest event in the history of the world.
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Source: Gazeta
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