If there were no Sun

If for some time already asked this question, it's time to reflect: What if the sun would go away? Man could provide lamps to brighten the day, heaters to not leave anyone cold, but certainly would not remember assist humble little plant.

Only there already see how the sun is important, he is born for everyone, for the poor, the rich,

 trees, animals and even the hidden vegetation behind a rock. Everyone enjoys this natural source of energy, but not everyone knows why it is so essential.

The sun generates energy through nuclear fusion of hydrogen, it combines hydrogen atoms to create helium and emit energy in the form of light and heat. In the plant kingdom, it operates in the process of photosynthesis, and without it our diet would be compromised, since it is through sunlight that plants develop fruit.

If this star vanish suddenly, the natural light incident would disappear, and within a few days the Earth would be cold. Everything that is our planet would be frozen rivers, seas, plants and humans us. The process would not be instantaneous, whereas the planet contains stored energy as the Earth absorbs heat from the sun. It would be like a sunset, when the temperature drops slowly.

But scholars in the subject advocate a frightening prediction that the sun will die here there are 6.5 billion years or so. Slowly and unobtrusively, our star will supposedly turn into a star without energy and life on Earth will be extinct, certainly not worth the wait to see.