The life cycle of stars

• Give the 6 life cycle stages of stars around the size of the sun.


  Nebula

  Protostar

  Main sequence star

  Red giant

  White dwarf

  Black dwarf
• Give the 6 life cycle stages of stars much more massive than the sun


  Nebula

  Protostar

  Main Sequence star

  Red super giant

  Supernova

  Neutron star or black hole
• What is a nebula


  A gigantic cloud of dust and gas in space
• When does a protostar become a main sequence star?


  When it's hot enough for hydrogen nuclei to go through nuclear fusion
• What process maintains the temperature of the core of a main sequence star?


  Nuclear fusion of hydrogen