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someone please explain the stars cycle. watch

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    please explain to me
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    (Original post by mk_cbc)
    please explain to me
    how about http://www.bbc.co.uk/schools/gcsebit...erserev2.shtml
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    (Original post by mk_cbc)
    please explain to me
    • gravity pulls cloud of dust and gas together --> protostar
    • protostar gets denser and hotter until the temperature is high enough for light nuclei to fuse (eg. H)
    • energy is released from the fusion and a stable main sequence star is formed
    • star runs out of hydrogen and gets cooler
    • # star <= size of sun # star > size of sun
    • turns into red giant
    • helium and other light nuclei fuse to form elements up to Fe
    • 'light' elements run out so fusion stops
    • star collapses in on itself, heats up and turns into a white dwarf
    • fades and goes cold --> black dwarf
    • turns into red supergiant + collapses
    • explodes in a supernova
    • BIG STAR: cools to form neutron star
    • HUGE STAR: becomes black hole

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    (Original post by surina16)
    • gravity pulls cloud of dust and gas together --> protostar
    • protostar gets denser and hotter until the temperature is high enough for light nuclei to fuse (eg. H)
    • energy is released from the fusion and a stable main sequence star is formed
    • star runs out of hydrogen and gets cooler
    • # star <= size of sun # star > size of sun
    • turns into red giant
    • helium and other light nuclei fuse to form elements up to Fe
    • 'light' elements run out so fusion stops
    • star collapses in on itself, heats up and turns into a white dwarf
    • fades and goes cold --> black dwarf
    • turns into red supergiant + collapses
    • explodes in a supernova
    • BIG STAR: cools to form neutron star
    • HUGE STAR: becomes black hole

    thank you so much
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    (Original post by mk_cbc)
    thank you so much
    no problem this is all you have to know for AQA but it might be different for other exam boards?
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    (Original post by surina16)
    no problem this is all you have to know for AQA but it might be different for other exam boards?
    I do AQA so its fine
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    (Original post by surina16)
    • gravity pulls cloud of dust and gas called a nebula together --> protostar
    • protostar gets denser and hotter until the temperature is high enough for light nuclei to fuse (eg. H)
    • energy is released from the fusion and a stable main sequence star is formed
    • star runs out of hydrogen and gets cooler
    • # star <= size of sun # star > size of sun
    • turns into red giant
    • helium and other light nuclei fuse to form elements up to Fe No, its CARBON. Iron is for bigger stars that supernova.
    • 'light' elements run out so fusion stops
    • star collapses in on itself, heats up and turns into a white dwarf ejecting its outer layers in a planetary nebula
    • fades and goes cold --> black dwarf
    • turns into red supergiant + collapses
    • explodes in a supernova
    • BIG STAR: cools to form neutron star
    • HUGE STAR: becomes black hole
    Edited
 
 
 
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