Outline the key stages in a star’s life in terms of the physical processes involved

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Outline the key stages in a star’s life in terms of the physical processes involved

  • Dust/gas cloud collapses with gravity
  • Protostar then begins fusion (heat and pressure)
  • Forms main sequence star (approx. 90% of life) until H runs out and He fusion begins
  • This makes a red giant (or super giant) until the He runs out
  • Super nova and core collapse – black hole, neutron star/pulsar or
  • Planetary nebula and core collapses – white dwarf