Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 9 years ago

sun will burn out one day?

is this correct? one day the sun will no longer exist and planet earth no more

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  • 9 years ago
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    Sun:

    Yes. The Sun can run out of expendable energy.

    ~ It will run out of hydrogen that can be converted to helium in about five billion years.

    ~ After that it will be a few more billion years before other elements that can fuse and provide energy are exhausted.

    ~ It would then take the Sun trillions of years to cool to where no light is emitted. This may not occur because in about 22 billion years from now, according to some theories, the expansion of the universe may tear it apart in an end call the Big Rip.

    Even after the Sun stops emitting any light, it will still exist. If there is no Big Rip, the subsequent time of existence of our Sun is thought to be on the order of the time of existence of the proton, known to be at least 10^32 (ten with 32 zeros after it.) years. Some simple grand unified theories predict a proton lifetime of no more than 10^49 years. If these theories are not valid, the proton may decay by more complicated nuclear processes, or by quantum gravitational processes involving a virtual black hole; in these cases, the time of existence is estimated to be no more than 10^200 years. If protons do decay, the mass of our Sun will decrease very slowly with time as its nuclei decay, until it loses enough mass to become a non-degenerate lump of matter, and finally disappears completely.

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    Earth:

    In five billion years when the Sun becomes a red giant. the Earth's orbit will be inside the Sun's photosphere. That photosphere will be many times less dense than the Sun's present day photosphere and today's photosphere is less dense than a laboratory vacuum on Earth,

    A solid Earth would have no difficulty maintaining a stable orbit inside the red giant Sun.

    The problem will be heat. The Earth will become hot enough to melt and then turn to gas. It will vaporize slowly like an ice cube in a kitchen oven, and cease to exist as a planet.

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  • 9 years ago

    Yes. As of currently there is nothing to save Earth from it's impending doom. 5 billion years from now the Sun would start to die by expanding into a red giant as it would stop burning it's current fuel source Hydrogen, and burn Helium due to the fact it ran out of Hydrogen. The Sun's current size is 0.01 AU. When the Sun is at it's massive size of 2 AU as a red giant it would consume all the inner planets. Earth could avoid this fate by moving farther away from the sun, but it's slim. Even if it moves farther away the Sun's intensive heat would roast Earth to a burnt out rock. Humans at this phase if we don't wipe each other out, or get wiped out would have moved to Saturn's moons like Titan, or towards another star system.

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  • Anonymous
    9 years ago

    no it won't burn out dear till your lifetime but as a matter of fact it may burn out. For instance our Sun is a small star and cannot cross the Chandrasekhar limit. Therefore, it may at first grow into a red giant and then it can use its all available energy to glow with a lot of luminosity thus turning into a white dwarf. If so happens then the sun will run out of its hydrogen fuel and will turn into a black dwarf. Well scientists are not sure that whether our sun has crossed the limit or not and if not then It may explode in a supernovae or turn lastly into a neutron star.

    Source(s): My book A journey back in time written by me.
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  • 9 years ago

    Sadly, yes. The sun will burn out in 5 billion years. It will suck up the planets Mercury, Venus, Earth, and possibly Mars.

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  • 9 years ago

    In about 5 billion years the sun will run out of Hydrogen. When this happens the sun, the sue will expand to a red giant stage. When this happens the sun will swell into the earth's orbit. The Earth will be engulfed. When the sun is in its red giant stage it will fuse Helium into carbon, and the sun is not massive enough to fuse carbon into any thing else. When the sun runs out of Helium, it will shed its layers to become a white dwarf star.

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  • 9 years ago

    Yes in about 4-5 billion years the sun will expand into a red giant star and begin throwing off it's outer layers -- then shrink down into a white dwarf star--

    Future alien astronomers will see something like this in their telescopes:

    http://en.wikipedia.org/wiki/Helix_Nebula

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  • 9 years ago

    They claim it will be December 2012 - Over the years there has been several predictions about the world ending but so far nothing has happened so lets hope the next prediction for next year is also wrong but one day it will happen, whether it will be the predictions from Nostradamus or the Aztec calender or Armageddon we will never know. Check out this link. Good Luck.

    http://survivalguide2012.org/

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  • 9 years ago

    It will not happen in one day, but over a million years. Most events on Cosmic scale take at least few thousand years if fast.

    The really fast (explosive) event is a Nova or supernova, that might take few (Earth) days. But the rate at which the expansion takes place is colossal.

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  • Tecto
    Lv 5
    9 years ago

    The sun will eventually burn out, for itself it is a star. It may create a black hole if I'm correct, but we may be on another planet by then.

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  • 9 years ago

    Flippin'eck Tucker, you're a bundle of laughs today...! Yeah, correct, but not in the lifetime of the species Homo Sapiens.

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