How will our sun die ?

Answer 1

After a low mass star like the Sun exhausts the supply of hydrogen in its core, there is no longer any source of heat to support the core against gravity. Hydrogen burning continues in a shell around the core and the star evolves into a red giant. When the Sun becomes a red giant, its atmosphere will envelope the Earth and our planet will be consumed in a fiery death.

Meanwhile, the core of the star collapses under gravity's pull until it reaches a high enough density to start burning helium to carbon. The helium burning phase will last about 100 million years, until the helium is exhausted in the core and the star becomes a red supergiant. At this stage, the Sun will have an outer envelope extending out towards Jupiter. During this brief phase of its existence, which lasts only a few tens of thousands of years, the Sun will lose mass in a powerful wind. Eventually, the Sun will lose all of the mass in its envelope and leave behind a hot core of carbon embedded in a nebula of expelled gas. Radiation from this hot core will ionize the nebula, producing a striking "planetary nebula", much like the nebulae seen around the remnants of other stars. The carbon core will eventually cool and become a white dwarf, the dense dim remnant of a once bright star.

Answer 2

Very slowly. Right now, it is estimated that the sun is halfway in its burning hydrogen to produce helium phase, which should go for another 4 billion years or so (although the sun will progressively get hotter over that time). When its core gets filled with helium it cannot fuse, the core will collapse, which will increase its temperature, up to the point helium can actually start fusing. But this will not last long, just a few million years. At that time, despite the core being smaller and more massive, the higher temperature inside will increase the sun's output, and the outer shell will expand, the sun will bloat out to a diameter about as large as the orbit Earth occupies (hence the earth will be scorched, burned, molten, vaporized), that will be the giant red star phase. Once the sun's core is filled up with the result of the helium fusion -- beryllium and carbon mostly -- and given that it lacks the gravity required to compress it again to a point where it could ignite and fuse that (heavier stars can do it, all the way to producing iron, beyond which fusing takes away energy; star that can do that will go supernova as a result and leave a neutron star or even a black hole after the explosion), so the sun will then expell its outer layers producing a planetary nebula, and shrink back and become a white dwarf, on a slow, very slow cooling process, over a billion years, leaving just a lump of cooled off stellar core in the end.
I do hope we could live to see that happen, because that would mean that we have space faring capability, and that we have nearly infinite lifespan. The universe is just too big for us to only have a puny 80 years life expectancy to wonder about it, don't you think?

Answer 3

It will most likely implode or explode when it runs out of fuel in few billion years. We will all be dead by then, but our however-many-greats-grandchildren will most likely die in the heat and flames. or perhaps presurefom the implosion/explosion. whichever comes first. all in all, disaster.

Answer 4

A firey explosion of death, then a huge freeze within 8 minutes of the explosion will freeze everything on the earth and instantly kill everything. Then God will judge everyone and eternal life will exist in the kingdome of God. I have much knowelege on the subject, as you know light and warmth form the sun travels to the earth in approx. 8 min. When that last 8 min. of power is gone...well, you know.

Answer 5

in a blaze of glory

Answer 6

It will burn itself out!

Answer 7

As big as it is. I'm guessing a heart attack.