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someone please explain the stars cycle.

please explain to me:frown:
Original post by mk_cbc
please explain to me:frown:


how about http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/waves_universe/stars_origins_universerev2.shtml
Original post by mk_cbc
please explain to me:frown:

•

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


:smile:
Reply 3
Avatar for mk_cbc
mk_cbc
OP
13
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


:smile:


thank you so much:smile:
Original post by mk_cbc
thank you so much:smile:


no problem :smile: this is all you have to know for AQA but it might be different for other exam boards?
Reply 5
Avatar for mk_cbc
mk_cbc
OP
13
Original post by surina16
no problem :smile: this is all you have to know for AQA but it might be different for other exam boards?


I do AQA so its fine :smile:
Reply 6
Avatar for Kyx
Kyx
6
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

:smile:


Edited

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