will the sun stop shining one day?if so ,then what will happen?

Answer 1

It will be a long long time from now when nuclear reaction no longer takes place.

Answer 2

It is true that the Sun is very slowly expanding and getting brighter right now. The reason for this is that as it is burning hydrogen to helium in the core the amount of hydrogen there gradually decreases. In order to keep the energy generation rate the same, the temperature and density in the core must rise. This has the effect that the energy can flow to the surface a little faster and it puffs up the outer layers (as well slightly brightening the Sun).

When the Sun runs out of hydrogen in its core completely (which won't be for another 5 billion years or so) nuclear reactions will stop there, but they will continue in a shell around the core. The core will contract (since it is not generating energy) and as it contracts it will heat up. Eventually it will get hot enough to start burning helium into carbon (a different nuclear reaction). While the core is contracting the hydrogen burning around it heats will heat up the outer layers which will expand, and while they do that they will cool. The Sun will then become what is called a Red Giant and its radius will be large enough to envelop the Earth!

Eventually the Sun will also run out of helium in its core. When this happens the core will contract again, but it will never be able to get hot enough to start burning any other elements into anything else. There will still be nuclear reactions of helium and hydrogen in shells around the core though, and these will continue to heat up the outer layers and cause them to move outwards. The core will eventually turn into what we call a white dwarf star, which is an extremely small (roughly Earth sized) dense star. A white dwarf does not generate energy so it will just slowly cool as it shines. The outer layers of the Sun will turn into what we call a "planetary nebula" (although it has nothing to do with planets) and gradually drift out into the interstellar medium. Planetary nebulae are some of the most beautiful objects you can see in the night sky( look here http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?planetary+nebula )

Answer 3

The sun will NOT go supernova. In 5 Billion years, the sun will have exhausted its hydrogen and begin fusing helium in its core. This will last another few million years. Once the helium is exhausted it will move through the table of elements, fusing successively heavier elements, up to iron. The sun will swell up and retreat as gravity and the pressure from fusion "fight it out." This cycle will continue until the outer layers of the sun begin to slough off and move into space. What will remain is a very small White Dwarf star, which, will eventually run out of heat and blink off.
As the sun expands and contracts, however, the actual diameter of the sun may be large enough to engulf the Earth, destroying our planet's atmosphere. We will have been long gone by then, possibly Mars or another planet that is habitable.

Hope this answers your question!

Answer 4

All life on Earth depends on the Sun. Nothing lasts forever, but the Sun and Earth will last millions of times longer than you or I will, so it isn't our problem, or even our great great great (million more greats) great grand children's problem. It is just way too far in the future to even think about. Stone henge and the pyramids in Egypt are brand new compared to how old anything we built today would be by the time the Sun ran out of energy.

Answer 5

The sun will stop shining, from scietists calculations, in about 5 billion years. I think u are gonna be dead by then...(duh).
But the sun will stop shining in a diffrent way.....itmight explode (SUPERNOVA)and turn to a red giant or it mmight dim down to a black dwarf!!
Poor sun...

Answer 6

Yes! It will run out of material and expand into a small Red Giant consuming the inner planets including Mercury, Venus, Earth and probably Mars. All stars succumb to death as does all things in the universe.

Answer 7

Our sun will burn out and become a "red giant". It will be so large at that time that it will eat up the first 3 or 4 planets. Earth is number 3, so it will be gone.

Answer 8

Not so much as stop shining but the sun will die. Don't worry, no human will witness that, they'll all be well and truly dead before that happens.

Answer 9

yes after millions of years sun will consume all the hydrogen and oxygen in it then something called super nova happens when the sun will blast

Answer 10

What a great question.!the solar it extremely is a important sequence action picture star is now in a mid-existence,if it properly substitute right into a pink massive action picture star it incredibly is going to burn and kill us all earthlings and the helium of our action picture star(solar) will burn and burn till it incredibly is going to likely be lifeless and blows up,substitute right into a nebula - white dwarf.