What would happen to us if the sun collapsed one day?
953193
we would die in s few hour
182304
great question - I wish I knew more but tides would be different. Also - the day would be shorter. The equatorial regions would be hotter, and the regions further away would be colder. The earth's rotation would be more stable with less wobble.
393960
Well, assuming you mean that the Sun just went out, but the Earth keeps orbiting:  probably for a little while.\n\nThe temperature would fall pretty quickly, though the oceans would give us a little reprieve; temperatures would remain livable near the oceans longest, and would be coldest inland.  Meanwhile, every photosynthesizing plant would eventually die from lack of sunlight, and soon every land animal would freeze or starve to death.  Even with modern technology, I doubt the last humans could make it for a couple of months.  Eventually, the atmosphere would rain, then freeze onto the surface, while the oceans would eventually freeze solid, or nearly so.  It would not be pretty.\n\nI've included two relevant links below:
1034315
Yes - it would.  But the likelihood is the other way around - the sun is more likely to get hotter and hotter - then explode into a supernova.
463963
I would say false.  The gravitational pull of the sun would pull it to it's doom.
686543
From the Wiki,\n\n"In about 5 billion years, the Sun will evolve into a red giant and then a white dwarf, creating a planetary nebula in the process."\n\nHumans will probably be long dead before then or will have moved on.  In a few billion years, the sun will get too hot for Earth to sustain life, but it'll be a while before it finally "blows up."  More accurately, it will actually implode and slowly become an inert mass.
523001
It would change the Earth's rotation and the Earth would tilt on its axis. What if all of us asked the same question at the same time that violated one of  Yahoo's community guidelines? Would the system completely break down?
1112651
Yes. but for it to stop then the Sun would first have to disappear as it is its gravitational pull which is causing the Earth to orbit at such speed. So there is probably more chance of you winning the lottery every day for the rest of your life than the sun doing a vanishing act.
1080616
The Sun, in 4.5 billion years supposedly, WILL start to swell. It will get bigger, and en-gulp Mercury and Venus. The atmosphere will evaporate, water will melt, and life will be gone. The sun will swell enough to devour the earth, then shrink, grow, Turn into a planetary nebula, then shrink, for the last time, into a white dwarf. Then In a few billion years, cool down to a black dwarf.\n\nThe reason the sun expands, In case you want to know, Is because of its fuel supply. The energy from the sun comes from nuclear fusion of Helium. When the helium supply runs out, The sun has to fuse hydrogen, therefore making the sun swell. The sun then will Shrink, once its helium supply is restored, grow again, then cast out a planetary nebula (For what a planetary nebula looks like, Look up the ring nebula) then it wont have enough hydrogen to grow back to the normal size...and become a white dwarf. Eventually, it will cool into a black dwarf and die. \n\nAnd no, incase someone posts it, the sun will not become a black hole.
1077025
It won't really matter as the sun will become a red giant just before it dies, enveloping most if not all the inner planets. When it does actually die it will go nova, blowing off most of its outer layers. This will most likely destroy all the inner planets that survived the red giant phase and eject the outer planets from our solar system (if it doesn't destroy them as well). \n\nLife on Earth can in no way survive this. After all this has finished our sun will most likely become what is known as a white dwarf  and will have about half it's current mass. Gravity will still exist but at half its current force. Any planets that stayed in orbit during the violence of our sun's nova would probably slowly increase its orbit until it just wanders off into space.\n\nI wouldn't worry about this too much as we've got abut 4 billion years to wait, give or take a couple million years.
19839
Brian is right, but I have to add a smart-ass remark that sun will burn up and go out in a few million years, but by then the humankind will either destroy itself, or find a way to move on to other stars.
876385
if you mean..." If the worlds oxygen ends what would happen?" then that is obvious. the worlds would slowly deteriorate\n\nLife would end
1170344
Sobrien, thats a really incorrect thoery.  The Sun wont even be able to turn into a black hole.  Am I the only person who knows what thier saying!?\n\nAnyway, the Sun, in 4.5 billion years supposivly, will start to swell.  It will get bigger, and engulp Mercury and Venus.  The atmosphere will evaporate, water will melt, and life will be gone.  The sun will swell enough to devour the earth, then shrink, grow, Turn into a planetary nebula, then shrink, for the last time, into a white dwarf.  Then In a few billion years, cool down to a black dwarf.\n\nThe reason the sun expands, Incase you want to know, Is because of its fuel supply.  The energy from the sun comes from nuclear fusion of Helium.  When the helium supply runs out, The sun has to fuse hydrogen, therefore making the sun swell.  The sun then will Shrink, once its helium supply is restored, grow again, then cast out a planety nebula (For what a planetary nebula looks like, Look up the ring nebula) then it wont have enough hydrogen to grow back to the normal size...and become a white dwarf.  Eventually, it will cool into a black dwarf and die.
368466
it would disappear... (as per the the current physiscs theory we have..)  it would go to the future :)
289825
Our sun does not have enough mass or density to go nova.\n\n"The Sun is about 4.5 billion years old. it has used up about half of its nuclear fuel (hydrogen). In about 5 billion years from now, the sun will begin to die.\n\nAs the Sun grows old, it will expand. As the core runs out of hydrogen and then helium, the core will contact and the outer layers will expand, cool, and become less bright. It will become a red giant star.\n\nAfter this phase, the outer layers of the Sun will continue to expand. As this happens, the core will contract; the helium atoms in the core will fuse together, forming carbon atoms and releasing energy. The core will then be stable since the carbon atoms are not further compressible.\n\nThen the outer layers of the Sun drift off into space, forming a planetary nebula (a planetary nebula has nothing to do with planets), exposing the core.\n\nMost of its mass will go to the nebula. The remaining Sun will cool and shrink; it will eventually be only a few thousand miles in diameter!\n\nThe star is now a white dwarf, a stable star with no nuclear fuel. It radiates its left-over heat for billions of years. When its heat is all dispersed, it will be a cold, dark black dwarf - essentially a dead star (perhaps replete with diamonds, highly compressed carbon)."\n\n---and---\n\n"Our star, the sun, was born in the heavens about 4.5 billion years ago. Our sun is about 1/3 of the way through its expected life. Scientists are now predicting the following events during the remaining life of our star:\n\n    * In the next 1.1 billion years, its brightness will increase by 10%. This will super-heat our planet as a result of a severe greenhouse effect. All of the oceans on earth will boil away and all life will be destroyed.\n\n    * In about 6.5 billion years, our sun will double in brightness and use up all of its supply of hydrogen fuel in its core. This will cause the sun to begin swelling as it uses hydrogen from the layers surrounding the core.\n\n    * In about 8 billion years the sun will swell to 166 times its present size. This giant star will swallow up Mercury, Venus, and maybe even our Earth. Our sun will then be what scientists call a Red Giant because it will be very large and red in color.\n\n    * After all hydrogen fuel is used, the sun will begin to use helium as its fuel. This fuel will burn very quickly and only last about 100 million years.\n\n    * In about 12 billion years, the sun will eject much of its outer layers and become a smoldering, collapsed core that scientists would call a White Dwarf."
1064710
The Sun will use up its hydrogen fuel in a few billion years.  At that point, it will shrink a bit because of the gravity of its own matter.  At some point in the collapse, the helium nuclei will begin to undergo fusion creating heavier elements.  This will cause the surface to expand and as heavier elements are formed, the Sun will evolve into a Red Giant.  Its surface will be somewhere around the orbit of Mars--thus vaporizing Mercury, Venus and the earth along the way.  The Sun is not massive enough to go supernova, only nova.  It will end its life as a white dwarf.
986985
Okay, the obvious thing is that we would stop having the change of day and night. It would really screw up our weather. For instance, wind is created by the uneven heating of the earth. If one side were to get all the heat, that isn't quite uneven is it? Meaning no wind. meaning weather wouldn't travel.  I don't know if that means one spot wouldn't get rain. Since, the whole water cycle is still going. At least on one side of the planet. Mainly, one side of the planet would stop working. (unless tht one side is were the deepest part of the oceans are, which is were animals and plants living off the heat and gases being expelled from inside the earth. those animals would still be alive.) The other side, would become over-heated. \nHowever, gravity might still exist. I wasn't really aware until about 2 years ago, but gravity is still a theory. Why, well its b/c not all the scientists agree as to why gravity exists. one argument is that the mass of a planet bends the fabric of space which causes things to head to it. Kind of like setting a bowling ball on a bed. The reason why we're not all colliding with the sun is b/c we create our own dent. So, yes gravity might still exist, even if the planet stops spinning, b/c that migt not be the reason gravity exists.  if you really want to learn about the theory that i was talking about. and possibly get a clearer view, is by reading Steven Hawkings Universe Inside A Nutshell.