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View Poll Results: Do you think the sun will shine forever

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  • Yes, because it's our sun

    0 0%
  • no , because duh it's still a star and will explode

    8 100.00%
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Thread: The end of life on earth( or the sun explosion theory)!

  1. #1 The end of life on earth( or the sun explosion theory)! 
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    There are some people who believe that the sun will have a eternal fire of life and last forever. But, other people( or some astronomers you could say) belive about 5 billion years later from here the sun will start using its helium and explode engulfing Mercury, Venus, Earth,and possibly Mars. Well which one would you choose and if you chose sun exploding please answer these questions.
    Would Earth be ready to handle this situation?
    Would Humans and Animals still be alive then?
    Also, If we did survive and the sun became a black hole would we be sucked in?
    Would there be other variables such as we find other planets like Mars or Jupiter or etc.?
    Would there be another star for us to rely on?
    Please evaluate before I go on forever :P ! Thanks


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  3. #2 The end of life on earth( or the sun explosion theory)! 
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    Okay some people belive the sun will shine forever, but some people think that the sun will just explode like any other star and engulf the Earth in flames. Which do you think? Also, please evaluate on these types of variables that may affect it.
    Will we have other planets to live on in the future?
    Will humans and animals live to be that long?
    Will there be another star in the milky way to provide heat?
    Would there be a way for earth to protect itself?
    What would happen if the sun became a black hole would earth be trapped in it?
    Please evaluate thanks! !


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  4. #3  
    Moderator Moderator Dishmaster's Avatar
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    Moderator's remark:
    Welcome to the forum. Please use the "edit" function instead of starting two nearly identical threads. I have merged them into one.

    Dishmaster (Moderator)


    Here just some clarifications to a few topics touched. There are already clear answers to a few questions that are posed here:

    The sun is a star, and as such, it is not different to any other star having a similar mass. It is absolutely clear that the sun will one day run out of hydrogen and will start fusing helium and higher elements until carbon and oxygen. Each of these burning periods is much shorter than the previous one, and the sun will expand to form a red giant star until all fusion ends and the radiation pressure from the inside stops. At that time, the self gravity prevails and leads to a collapse. The resulting shockwave causes the outer layers of the sun to be blown away. The core of the sun remains and slowly cools down in form of a white dwarf.

    All this is scientifically established and not a matter of debate any more.

    Already the evolution to the red giant stage will be fatal for the earth, because the proximity of the solar surface will cause a rise of temperatures until at least all water will evaporate. The earth will then be similar to a steam kettle.

    The sun will not evolve into a black hole. Only stars with much more mass than the sun can produce enough gravity to create the sufficient density at the end of its lifetime.

    Edit: I did not participate in the poll, because both answers are actually wrong.
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  5. #4  
    Forum Senior PhoenixG's Avatar
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    Won't the earth become uninhabitable long before this anyway due to the natural increase in radiation over the rest of our star's life? IIRC, the numbers are something along the lines of a few hundred million years from now?

    Granted the earth will still be here, but all the water will have boiled away, our atmosphere will be gone, etc.

    Note: this is not an invitation to start an off-topic discussion on global climate change.
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  6. #5  
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    we will probably be gone long before the sun explodes anyways.
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  7. #6  
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    Hereís the rundown:
    http://www.astronomy.ohio-state.edu/.../vistas97.html

    As to where we may go, our ancient ancestors lived in the trees or in caves. Today we build our homes from lumber and stone. In the future we will build habitats in space that resemble our present homes on Earth. Imagine taking a map of your community (say four to five square kilometers) and then roll the map into a tube so that the edges just barely overlap. Close the ends to form a microcosm and put this in orbit above the Earth.
    http://en.wikipedia.org/wiki/Bernal_sphere
    You have continuous free energy from the Sun to power industry and year round agriculture.
    Unlimited growth leads to a Dyson Sphere.
    http://en.wikipedia.org/wiki/Dyson_Sphere
    So you donít really need planets and since the habitats are microcosms, you can build them around any star anywhere.
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  8. #7  
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    Just one minor point to add to Dishmaster's post. If it were somehow possible for our sun to turn into a black hole, it would still only have the same gravity as now so we would continue orbiting it as we do now.
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