When will the sun burn out?
96467
Our Sun will "burn out" in about 4.5- to 5.0-billion years from now.\n\nRight now the Sun is converting hydrogen into helium at a rate of some 600-MILLION metric tons per second. Once this main fuel source is exhausted, the Sun will begin fusing helium, and once that's gone it will "burn" progressively heavier and heavier elements. Each change in fuel will be accompanied first by a diminishment in size, then a period of swelling. Mercury, Venus, and Earth will be consumed. Finally nothing but iron will be left to burn in the Sun, and since the energy required for that is higher than the Sun can generate, it will gradually dwindle more and more in size until it will become what's called a 'white dwarf' star.
1166809
our earth would burn due its heat along with the sun's heat
80131
According to answers.com, the sun will last another 6 billion years, so you don't need to worry about it. It also says that it will turn into a white dwarf. Yet, the other source says that it will last around 5 billion years until it turns into a white dwarf. Then, it will cool down, taking billions of years, then turn into a black dwarf.\nhttp://www.enchantedlearning.com/subjects/astronomy/stars/lifecycle/\nhas a diagram to show the cycles of stars like the sun.
591558
depends on your latitude. You have to find a sun-path chart for your latitude.
480364
Yup. The latest will be 5 billion years from now, give or take a few hundred thousand. By then the sun will either:\n\n1) engulf our planet (very unlikely, but will come close enough to vaporize our planet)\n2) Die and not engulf or vaporize our planet and within days our atmosphere will freeze and fall to the earth in the form of ice.
31978
We would always have solar power for the next few billion years at least. Because of solar energy, you will also have wind, hydroelectric, waves and such - which are all caused by the effect of sun on the atmosphere and oceans.\n\nSolar energy may taper off once the sun becomes a red dwarf. But then we would all be dead and may not need much energy.
985287
THe SUN IS NOT BURNING. IT IS MADE UP OF MILLION OF STARS SO IT DOES NOT NEED TO BURN.
1166435
Yes.  The sun will blow up in about 4.5 billion years, taking the earth with it.  Odds are humans will have been gone long before that though.
1076079
The sun will grow until it engulfs the Earth before it burns out.  And long before that, the temperature will get way too hot and evaporate all the water, and the planet will no longer be able to support life.
840496
Scientists say that in 5,000,000,000 years, the sun will suddenly expand, probably all the way to Earth's orbit.  Even if it doesn't come this far, we will be fried. Before then, humanity may end, but Earth will still be here.
1097113
The sun will die because the hydrogen inside it will eventually be used up. This will create enormous pressure and make the sun increase in size, in fact so large that it will engulf the earth. This enlargement is called a red giant. Then it will blow up and all that will remain is the core or a red dwarf that may collapse in on its self creating a black hole. And all this will happen in about 7 billion years, so no need to worry!
759134
I'm afraid its "Goodnight Vienna" for us. As this is unlikely to happen for another 5 billion years or so though, there is a fair chance that we will have blown ourselves up or evolved into something a little more intelligent and cleared off elsewhere by the time it happens.\n\nAlthough the Sun uses up around 5 million tons of hydrogen every second, it still has enough left in its core to last for another 5 billion years or so. When it finally does run out of fuel, though, it will swell up to many times its present size and become what is known as a red giant. \n \nThe outer layers of the Sun will grow to swallow up the planets Mercury and Venus and they may even reach out as far as Earth. Way before the Earth is swallowed the surface of our planet will be scorched, its oceans boiled dry and most of the atmosphere will be stripped away.\n\nAs a red giant, the Sun might be able to exist for a few more million years. During this time it will shed matter quite quickly. The solar wind will strengthen to a solar gale. Finally, the Sun may cast off most of its outer layers as a bright shell of gas called a planetary nebula.\n\nAll that will be left behind is a very hot, dense core. The Sun, in fact, will have become a white dwarf - a star no bigger than the Earth. Gradually, over many millions of years, even this small star will cool. The Sun will end its days quietly as a dimming ember in space.\n\nThe attached link shows a photo of a star similar to the Sun in its death throes.
809960
Actually, at our close range to the sun, it would be so bright that everything would be completely washed out. It would be blinding to even be outside. It is true that the photosphere will be cooler, but the sun will be so much larger that the total light we receive will be much, much more. As for sunset and sunrise, if I had to guess I'd say that they would take longer and it would stay bright for a long time after the sun goes down (and get brighter a long time before the sun comes up). This is all assuming that it hasn't swallowed the Earth yet, which it will do at some point.
1020246
Our planet will not die until the sun burns out.  Everything revolves around a cycle.  This planet has survived for millions of years all with life.  There will never be a scarcity of anything but certain species of animals.  Humans are far too smart to make the earth go to shame.  Since 1920 our knowlege has doubled 37 times.  Before then it had only doubled 18 times in thousands of years.  Earth is on the incline not decline.
1054994
The Sun won't. The Sun is not large enough to become a super nova.
87409
that the sun gived up
596030
The sun isn't expected to exhaust its nuclear energy for another 4-5 billion years, but when it does, it's supposed to turn into a white dwarf.  On Earth, pretty much everything would die after getting roasted, but that's a bit too far down the line to worry about.  There's a better timeline here: http://www-astronomy.mps.ohio-state.edu/~pogge/Lectures/vistas97.html\n\nPerpetual motion is pretty tough because there's always going to be some sort of friction, which causes heat and energy to be taken out of the system.  You then need to keep putting energy into the system for the motion to continue.