The sun has already lived half of its life and will not stop for another 4.5 billion years, says Vladimir Kuznetsov, director of the Earth's Magnetic Field Institute, the Ionosphere, and Radio Broadcast Broadcasting of the Russian Academy of Sciences.
According to Kuznetsov, the average life of the Sun is about 10 billion years old. The main star has lived 4.5 billion years, so he has about half his life.
"The sun is in the main sequence of star evolution (…) The time the star stays in it is the most distant in its development because it occupies 90% of its life," Kuznetsov said with Sputnik.
The scientist stressed that the thermonuclear reaction – which is the main source of solar energy – appears constantly at the head of the star.
Kuznetsov believes that solar energy will change when all the hydrogen is sunburned on the Sun and when the helium and other heavier chemical elements will be destroyed. According to the expert, these processes will take place in approximately 5000 million years and will lead to the Sun spreading into Venus orbit.
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As a result, the star catches the nearest planet, burns the Earth and starts to cool down, becoming a white dwarf with a radius of only 10 kilometers and colossal density. Planets like Mars, Jupiter, and Saturn will circle around this inert dwarf star.