If The Sun Went Out, How Long Would Life On Earth Survive?

Reminds me of a science fiction short story I read decades ago by Fritz Leiber, called "A Pail of Air." Here it is:
http://www.webscription.net/chapters/0743498747/0743498747___6.htm

Very interesting write up. The most interesting part that they make reference to is that life would go on at the bottom, warmest parts of the ocean. Exactly why Europa must be reseached. Alien ocean? Check. Possible warm waters heated by the planets core? Check. Life? Yup, see it here:www.ootwo.com/europa.asp Like I said, pretty interesting stuff.

well, warm ocean bottom or not, it would still SUCK if the sun went out...but thats just me...

I agree, there could be life on europa.....SO STOP LOOKING AT MARS!!!!!

And this supports it.

-THE KID

If the sun was suddenly gone then the earth would fly off out of orbit instanly ? Does this mean that gravity is faster than the speed of light? I t takes about 8 minutes for light to reach earth from the sun. But the planet would instanly fly off into space if the sun was suddenly gone? Am I crazy or is Einstein's theory wrong that nothing is faster than light?

Sounds exciting; can't wait to live in Iceland or the ocean.

Also, pirate941, gravity isn't a particle, it's a force, whereas light is EMR (which can be treated somewhat as a particle). Einstein's theory was that no object or particle could travel faster than light. So yes, if the sun disappeared, we would be thrown out of orbit instantly but would still have light for 8 minutes.

In response to pirate941. Yes it would be immediate. Because just like electricity and magnetism, gravity is a field. It creates a potential energy on an object at a certain point is space without any regard to time. Look it up in your favorite physics textbook.. but theres your answer.

It would suck to be people who hate the cold or have never seen snow

more importantly, what would we eat to sustain the surviving population

really interesting but a little bit cold.

anyone else hear that if the sun stopped it's fusion process right now it would take 1,000,000 years for the light to surface because of the suns denisity and mass? because thats what i heard and NASA space camp. so really we would have 1,000,000 years and 8 minutes to live untill that starts to happen

To pirate, polohunk, aznacorn.
No, no, no and a little more of no.

Nothing goes faster than light, (maybe tachyons ;-) ).
It would take 8min for us to lose the gravity grip.
It goes for things, fields, information and the lot.

If it was true that gravity was instant you could build
a device to comunicate, with gravity waves, over lightyears
in an instant. Wiggle your local black hole and and the guys
at the Andromeda galaxy could pick it up now (2mega ly)

Does gravity travel faster than the speed of light?

Newton himself called the idea of instantaneous gravity "absurd."

The real answer is that we do not know. Many believe that it does not, but if you do not assume that the speed of gravity is instant, and you try and calculate the orbits of the planets, you come up with unstable orbits.

But special relativity concludes that nothing can travel faster than the speed of light, and that would have to include gravity.

This, however, does not fit with our observations of the universe - ie how can gravity escape black holes while light cannot, how can binary stars predict each other's orbit, etc. General relativity tries to get around this with curved space time, then perturbations propagate at the speed of light, gravitational radiation, etc etc blah blah blah. And while I can agree with curved space time, the rest of the math just gets way too messy. The answer to all of that is that relativity simply is wrong. It's close - but in the end it is a theory, not a fact. It is good to describe many things, just not this.

Even the Earth and Moon's orbits would not be possible if we accounted for an 8.3 minute gravitational delay (same as light) from the Sun - they would be unstable to the point of collapse. It is true that "gravitational waves" are bound by the speed of light, but they are altogether something different from gravity itself (think of ripples in the space time fabric caused by a quickly rotating neutron star with a large mountain on it) - since "gravitational waves" has the word gravity in it, I think that must be what causes this misconception that gravity travels as slowly as light.

Since we don't yet have the math to describe an upper limit (special relativity fails miserably at this), we can at least deduce a lower limit on the speed through scientific observation. Some recent numbers I've come across peg the speed of gravity to be at least 2*10^20 c.

You idiots, if the sun instantly disappeared, the gravity of the sun would do so too. Thus you would be a-sling shot into the vast of space. And the light of the sun would still reach you, but it would take a little longer than eight minutes. That being of course because you'd be a good ways further than ninty something million miles from where the sun had once existed. Though something i cant figure out, would the earth stay spinning as long as it doesn't come into contact with another gravitational pull, and doesn't get smashed by a huge astroid? And secondly, would the moon still orbit the earth regardless of wether it would stay spinning or not?

i dont think i would heat things up it was ont what if the middle of winter you would die duh!!!!!!!

Nova_8768

Assuming that the earth did not come into contact with another gravitational force, the earth would keep spinning. Newton's first law explains this. An object at rest remains at rest; an object in motion remains in motion unless acted upon by an unbalanced force.

As for the moon, because of its proximity to the earth, I'm pretty sure it would remain in orbit. The earth's gravity would still be the greatest force acting on it. So it would still behave as it usually does.

OK people, in theory if the sun went out then it just mean that the heat it produces stop but gravity will still be there to make more heat as it causes nuclear fission, so in my opinion the person/people that think the sun is going to go out is arent that bright, and "if" it does the chances the life "mircoorganism on earth is going to survive for a long time is really low due to the fact that we can crash into mercury, venus, mars, astroids metors and a whole bunch of space object in out solar system while flying out of control.
imagine earth and mars and the moon hitting, WOW thats a really big explosion

you guys are retarded... if the sun vanished into thin air. with no explosion. we wouldnt know for 8 minutes, because the light AND gravity wont go away for 8 minutes. life on the SURFACE would almost seize to exist, but humans, who can build habitats to stay warm. they could also create plant life using man made light, and if the habitats were big enough they could have farms with cattle. Assuming we dont hit another planet or object in space, humans can survive. Just not like we do now.

wait hold on, so if the sun went out! and the earth went spinning out to the universe! then would earth still survive? if the earth was not in orbit!?

People who call others idiots in a public forum should check their spelling and grammar, lest they reveal more about themselves than they intend.