how stars start

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hydrogen nuclei join together to make helium nuclei
- When the temperature is hot enough nuclear fission starts
  - how stars star
    - nebula of gas and dust collapses due to gravity
when the outward pressure and the gravity are balanced its a star
lots of heat and light
- When the temperature is hot enough nuclear fission starts
  - how stars star
    - nebula of gas and dust collapses due to gravity
- when the outward pressure and the gravity are balanced its a star
all heavier element up to iron are made in stars by nuclear fussion