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GCSE: P2: black dwarfs watch

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    Hi,
    I really have no idea what happens to a star after the main sequence period in order for it to become a black dwarf. I don't even know what the main sequence is?
    If some one knows please could they help me
    Thank you


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    Main sequence is the part of a Star's lifespan where it spends the majority of its lifespan and is most stable. It ends when it runs out of hydrogen in its core. The steps towards a black dwarf is this: main sequence > red giant > white dwarf > black dwarf.
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    (Original post by zarrii)
    Hi,
    I really have no idea what happens to a star after the main sequence period in order for it to become a black dwarf. I don't even know what the main sequence is?
    If some one knows please could they help me
    Thank you


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    After main sequence. it becomes a red giant (like the sun will be)

    Then it sheds its outer layers in a nebula, with a white dwarf left over.

    This white dwarf then cools down to become a black dwarf
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    (Original post by Vikingninja)
    Main sequence is the part of a Star's lifespan where it spends the majority of its lifespan and is most stable. It ends when it runs out of hydrogen in its core. The steps towards a black dwarf is this: main sequence > red giant > white dwarf > black dwarf.
    Thank you so much!!


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    (Original post by Kyx)
    After main sequence. it becomes a red giant (like the sun will be)

    Then it sheds its outer layers in a nebula, with a white dwarf left over.

    This white dwarf then cools down to become a black dwarf
    Thank you very much but what is a nebula?


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    (Original post by zarrii)
    Thank you very much but what is a nebula?


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    Cloud of dust and gas in space.
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    (Original post by zarrii)
    Thank you very much but what is a nebula?


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    A cloud of gas and dust.

    Such as the 'Eagle Nebula' or the 'Horsehead nebula' or the 'Crab nebula' or the 'Orion nebula' or the 'Cat's eye nebula' (to name just a few, if you want to google images of them )
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    (Original post by Vikingninja)
    Cloud of dust and gas in space.
    Thank you


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    (Original post by Kyx)
    A cloud of gas and dust.

    Such as the 'Eagle Nebula' or the 'Horsehead nebula' or the 'Crab nebula' or the 'Orion nebula' or the 'Cat's eye nebula' (to name just a few, if you want to google images of them )
    Thank you :*


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    (Original post by zarrii)
    Thank you :*


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    np
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    More specifically, it will be a planetary nebula

    It has nothing to do with planets, though
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    (Original post by Kyx)
    More specifically, it will be a planetary nebula

    It has nothing to do with planets, though
    Your amazing thank you so much for your help!!!!! Xxxx


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    (Original post by zarrii)
    Your amazing thank you so much for your help!!!!! Xxxx


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    np
    If you need any more help, just PM me

    or ou can talk to me here http://socratic.org/users/kyx

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    To add to the phase of going from a white to a black dwarf it just cools down over time. The white dwarf has no nuclear reactions anymore in it but because space is a vacuum it takes ages to cool down. Not sure what detail you need to include with the main sequence going into a red giant and then into a white dwarf for GCSE but it gets more in depth at A level.
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    (Original post by Vikingninja)
    To add to the phase of going from a white to a black dwarf it just cools down over time. The white dwarf has no nuclear reactions anymore in it but because space is a vacuum it takes ages to cool down. Not sure what detail you need to include with the main sequence going into a red giant and then into a white dwarf for GCSE but it gets more in depth at A level.
    Thank you for all your help


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