Clouds of dust and Gas --> Pulled by gravity in towards each other --> Friction causes temperature to rise --> Protostar --> Temperatures get so high that nuclear fusion begins - hydrogen fuse to form helium nuclei --> Main Sequence Star --> Hydrogen begins to run out --> Star swells to form a Red Giant
Then three things can happen:
--> Explodes as a Supernova --> leaving a Neutron Star and a cloud of dust/gas that can form a Second Generation Star (if high mass)
--> Explodes as a Supernova --> this can create a Black Hole (if extremely high mass)
--> Contracts to leave a White Dwarf --> Light fades to form a Black Dwarf (if low mass)
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