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Thread: What will happen if the sun suddenly goes out?

  1. #1 What will happen if the sun suddenly goes out? 
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    Ok, if the sun suddenly disappeared, went out (something that is not realistic..) what would happen. How long time had it gone before we died?

    * The sun went out
    8. minutes: The last light from the sun reaches earth. It becomes cold.
    One-two days: Most humans on earth dies (?)
    Week: average global surface temperature drops to under 0 F (-17,8 C)

    What will happen further? When will the oceans freeze? How long can humans live under ground with nuclear as energy source? When will all life be gone?


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    Forum Senior TheObserver's Avatar
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    Let me give you some advice. If the sun goes out, give up.


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  4. #3  
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    Pretty sure I and many back woods types could last a month or more, after which even preparing for the "worst" wouldn't be enough.

    While the scenario is far fetched, it's effects aren't and probably resemble something like Earth went through during the cretaceous-tertiary extinction event some 65 million years ago, when dust blocked the sunlight for months.
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    Without sunlight: Earth will resemble an extra-terresterial bodies in space (no heat, no water, no oxygen, no life), so to sustain human life you need a life-support system that is very like a spacecraft. Nuclear submarine is not possible because the sea freezed & there's no fresh air (so the system cannot renew the air & so it need filtration system, and it has to recycle water, and need to produce food). It is unlikely that a human will survive this cataclysmic event because not even ISS has been able to replicate self-sustaining life-support system (a crude way of resorting to plant-life may not be efficient enough for such close-loop system).

    In an efficient self-sustaining system: food is produced by a bio-reactor that convert human effluent into an edible protein by adding energy, unfortunately this technology doesn't exist/not-perfect yet and so you can't possible survive this cataclysmic event if it ever to happen NOW. Possibly you can survive on food stockpile, but this method has its limit (if we assume we have infinite nuclear energy)...

    ++ you can eat frozen people. 7 Billion dead people is alot of food! You can do an EVA and pull some victim to the airlock...
    Last edited by msafwan; February 26th, 2012 at 03:42 PM.
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    Quote Originally Posted by gaptrast View Post
    Ok, if the sun suddenly disappeared, went out (something that is not realistic..) what would happen. How long time had it gone before we died?

    * The sun went out
    8. minutes: The last light from the sun reaches earth. It becomes cold.
    One-two days: Most humans on earth dies (?)
    Week: average global surface temperature drops to under 0 F (-17,8 C)

    What will happen further? When will the oceans freeze? How long can humans live under ground with nuclear as energy source? When will all life be gone?
    Well, according to General Relativity, gravitational force "travels" at the same speed as light.

    So 8 minutes: Light goes out at Earth / Earth is flung out of orbit.

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

    Within a week, the average global surface temperature would drop below 0F. In a year, it would dip to –100. The top layers of the oceans would freeze over, but in an apocalyptic irony, that ice would insulate the deep water below and prevent the oceans from freezing solid for hundreds of thousands of years. Millions of years after that, our planet would reach a stable –400, the temperature at which the heat radiating from the planet’s core would equal the heat that the Earth radiates into space, explains David Stevenson, a professor of planetary science at the California Institute of Technology.
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    A lot of people would die from cold, but sheltering yourself from cold is easy whats hard is turning around to cultivate new food without sunlight in a time frame thats fast enough to meet peoples needs, so most people would die from starvation. People could build hydroponic/aquaculture/interior gardens that use energy to produce light and composte and waste/crap as fertilizer. Imo the best source of energy might be geothermal. If people had decades to prepare and underground cities were designed to cultivate food without sunlight and recycle everything like on a mars colonny, using geothermal energy and energy saving designs, these earth colonies could probably make it for hundreds of years.

    Edit: finding shelter for arctic conditions is easy (igloo) but i have no idea what happens below -100 thats getting to be serious shite cold. I guess you can insulate houses like crazy, turn on heat, and walk around inside in winter clothes and sleep inside an arctic tent inside the house?
    Btw, a lot of normal vehicles(cars) that might work in -30 degrees dont automatically work when it gets much colder than that (and normal clothing becomes rigid).
    Whats the part where theres no oxygen, is that because of lack of plants and algee?

    But i think the sun going giant red or something proves to be a greater challenge and would require an exodus farther away (mars far enough?).
    Last edited by icewendigo; February 26th, 2012 at 04:34 PM. Reason: Sunlinght ;)
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    All those stuff sounds like a happy ending... so it is impossible. Humans have no hope for sure...
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    If the sun would go out, it would probably be just a matter of time until food supplies go our as well. And that would be the end.
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    The Star by H.G. Wells, anyone?

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    If the sun were to suddenly stop existing, then all living organisms that possess psyches would experience psychological distress so extreme that every system in their bodies would shut down [the brain being the first]. Here is why.

    A rapid and permanent dimming of the day sky is an extremely terrifying event. It causes so much emotional agony [in the form of fear] that it leads to psychological dissociation, dangerous psychosomatic conversions, and a lethal collapse of blood circulation [psychogenic shock].

    It's true. What damages the mind can damage the body -- starting with the central nervous system -- if the mental trauma is severe enough.
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    Green Xenon,

    Please don't post this pseudoscientific drivel in the science fora. Save it for pseudoscience where it belongs.
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    Quote Originally Posted by Green Xenon View Post
    If the sun were to suddenly stop existing, then all living organisms that possess psyches would experience psychological distress so extreme that every system in their bodies would shut down [the brain being the first]. Here is why.

    A rapid and permanent dimming of the day sky is an extremely terrifying event. It causes so much emotional agony [in the form of fear] that it leads to psychological dissociation, dangerous psychosomatic conversions, and a lethal collapse of blood circulation [psychogenic shock].

    It's true. What damages the mind can damage the body -- starting with the central nervous system -- if the mental trauma is severe enough.
    I think the minus lots of degrees and the seas (and even atmosphere) freezing - and of course the sudden cessation of photosentysis and the resulting death of all plants and cyanno bacteria might be more of a problem than "emotional agony".

    I'v known people who have gone to the Arctic circles before (one was an ex-girlfriend) and 4+ months of darkness is a problem for sleep patterns and depression... but the -20 or "colder" temperatures are more of a problem. Fortunatley they have the support of supplies from locations with warmer climates and plants that can grow from places closer to the tropics usually delivered by ship or in some cases plane. If the entire world was a dark winter Antarctica Food becomes... a very very big problem.

    Give it a few months or at most years for the air to freeze. Maybe a few spots where volcanos exist will be able to melt enough frozen Nitrogen and Oxygen to be useful, but air pressure will be severely mars-like. Or maybe more Triton (moon of Neptune).
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    Quote Originally Posted by gaptrast View Post
    Ok, if the sun suddenly disappeared, went out (something that is not realistic..) what would happen. How long time had it gone before we died?

    * The sun went out
    8. minutes: The last light from the sun reaches earth. It becomes cold.
    One-two days: Most humans on earth dies (?)
    Week: average global surface temperature drops to under 0 F (-17,8 C)

    What will happen further? When will the oceans freeze? How long can humans live under ground with nuclear as energy source? When will all life be gone?
    Nuclear energy can supply prodigious quantities of energy, which is a good thing, since plants require vast amounts of such energy to perform photosynthesis- theoretically, with adequate preparation humanity could hang on for millions of years under the terrestrial surface, warming air for breathing and ice as losses from mostly closed cycle habitations as described in #4 occurred, but the question as posed involves a sudden and presumably unanticipated crisis, so, ...
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    Quote Originally Posted by MeteorWayne View Post
    Green Xenon,

    Please don't post this pseudoscientific drivel in the science fora. Save it for pseudoscience where it belongs.
    There may be something to it, in a milder form- Seasonal Affective Disorder is a documented phenomenon, and such an event WOULD represent a huge change in status quo- look at the trauma produced by September 11th, 2001 AD...
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    Quote Originally Posted by gaptrast View Post
    Ok, if the sun suddenly disappeared, went out (something that is not realistic..) what would happen. How long time had it gone before we died?

    * The sun went out
    8. minutes: The last light from the sun reaches earth. It becomes cold.
    One-two days: Most humans on earth dies (?)
    Week: average global surface temperature drops to under 0 F (-17,8 C)

    What will happen further? When will the oceans freeze? How long can humans live under ground with nuclear as energy source? When will all life be gone?
    If the sun goes out, the solar system excluding the Sun will move in opposite direction to the Sun due to conservation of momentum. So there is a possibility that this system comes into the gravity of another star and form a totally new system.
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    No, not the opposite direction. It would continue in a straight line, at right angle to where the sun used to be, more or less. Since the planets (and the former sun) orbit the barycenter of the solar system, the path would still be somehwat curved.
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    Quote Originally Posted by Robinol View Post
    Quote Originally Posted by gaptrast View Post
    Ok, if the sun suddenly disappeared, went out (something that is not realistic..) what would happen. How long time had it gone before we died?

    * The sun went out
    8. minutes: The last light from the sun reaches earth. It becomes cold.
    One-two days: Most humans on earth dies (?)
    Week: average global surface temperature drops to under 0 F (-17,8 C)

    What will happen further? When will the oceans freeze? How long can humans live under ground with nuclear as energy source? When will all life be gone?
    If the sun goes out, the solar system excluding the Sun will move in opposite direction to the Sun due to conservation of momentum. So there is a possibility that this system comes into the gravity of another star and form a totally new system.
    Coming to a new star? Like shooting a bullet at a few marbles 100,000 miles away, but their gravitational fields might blow them up to the size of basketballs. That doesn't do much; you'll have to practice your aim then

    And why would you think it would go in the opposite direction? Flinging a stone from a pole doesn't make it go directly away from the center, but tangent to the orbital curve and in the direction traveled. The same going here.
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  19. #18  
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    All life on earth is based on suns light, so if sun goes out everything else goes out with it...
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    Not right away, tesla spammer...
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    How long could we survive? No food, temperature who knows how low, and then there is chaos among people, people would kill each other over a peanut, I agree that we would not die right away, but it would be shortly...
    And I certainly am a Tesla fan, buddy
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    Shit. Bad shit would happen.
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