stars

• what do the stability of stars depend on

  radiation

  gas pressure
• what are stars formed from

  hydrogen

  helium

  dust

  gas
• Protostars form when gravity collects this cloud together and as it is compressed it heats up
• hydrogen fuses to form helium
• what is the life cycle of stars?

  protostar, main sequence, red giant , supernova, black hole.
• outward radiation and gas pressure forces are balanced by gravity forces