Our solar system gets light and heat from the sun. Due to this life on earth became possible. Since ancient times, people in different parts of the earth have been worshiping the sun as a deity. Now scientists fear that after billions of years from today the end of the sun will turn our earth into the worst place in the solar system. During this, the size of the Sun will increase so much that it will absorb Mercury, Venus and even our Earth.
Our sun has lived half its life
Scientists believe that the present age of the Sun has become 4.6 billion years. Which is about half of its estimated 10 billion year lifetime. After so many years from today, when the hydrogen fuel of the sun runs out, it will resort to heavy elements to generate energy. At that point the sequence phase of the sun will end. At that time, strange changes will also be seen in the shape of the sun.
Shrinking of the helium core will increase the size
The helium core of the Sun would shrink and heat up while generating energy from the heavier elements. This is expected to increase the size of the Sun by more than 100 times. The swollen sun would swallow up the Mercury, Venus and Earth of our solar system. Then if someone is present in any other solar system, then our sun will be visible to him as a big red star.
Different types of fusion reactions will start in the sun
With such a large change in size, different types of fusion reactions will start inside the sun. Its outer shell will burn hydrogen as fuel and other products produced will provide energy to the core inside the sun. This would make the core of the Sun more compressed and hotter. When the core reaches 180 million degrees Fahrenheit (100 million degrees Celsius), its helium will begin to burn and fuse into carbon and oxygen.
Sun will reach the last stage of life
Due to this the Sun will shrink for a few million years, but later it will expand again for 100 million years. When the helium of its core reaches the verge of extinction, then the brightness of the sun will increase further. During that time the stellar wind blowing outwards will remove the outer shell of the sun. This will lead the sun towards the final stage of its life cycle.
Many planets will be burnt to ashes by the heat of the sun
Astronomer S. Alan Stern of NASA’s Science Mission Directorate says that the swollen Sun will burn many planets in our solar system to ashes. Wherever water or ice is present in the entire solar system, everything will disappear. The farthest planet Pluto, where the temperature is always minus, will also be as hot as the temperature of a tropical beach.
[Attribution to NBT]