The sun has already lived about half of its life and will not be closed in the next 4.5 billion years, says Vladimir Kuznetsov, director of the Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences.
According to Kuznetsov, the life expectancy of the sun is about 10 billion years. The main star has already lived 4.5 billion years, so he left about half of his life.
"The sun is in the main sequence of the evolution of stars (…) The time during which the star remains in it is the longest in its evolution, since it takes 90% of its life," Kuznetsov said in an interview with Sputnik.
The scientist stressed that thermonuclear reaction, which is the main source of solar energy, is constantly found in the depths of the star.
Kuznetsov believes that solar energy will change when all the hydrogen in the sun is burned and when the destruction of helium and other heavy chemical elements begins. According to the expert, these processes will take place in about 5000 million years and will lead to the expansion of the Sun into the orbit of Venus.
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As a result, the star absorbs the nearest planet, burns the Earth and begins to cool, becoming a white dwarf with a radius of only 10 kilometers and an enormous density. Planets such as Mars, Jupiter and Saturn will rotate around this inert dwarf star.