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Space - Coggle Diagram

- - - - Dark matter is an unkown substance that holds galaxies together but doesn't give off electromagnetic radiation
- - - - Stars bigger than the sun:
        
        Protostar becomes a MAIN SEQUENCE STAR - in a main sequence, hydrogen nuclei are fused together to form helium (nuclear fusion) This releases energy as heat and light
        
        Nuclear fusion changes more and more of the star's mass to energy where it then expands into a red supergiant
        
        The star then explodes in a supernova which produces elements heavier than iron and scatters them around the universe
        
        Supernova then leaves behind either a BLACK HOLE OR A NEUTRON STAR
      - Stars similar size as the sun:
        
        Protostar becomes a MAIN SEQUENCE STAR - in a main sequence, hydrogen nuclei are fused together to form helium (nuclear fusion) This releases energy as heat and light
        
        Hydrogen fuel runs out eventually where the star then cools and becomes a red giant, the star then fuses helium nuclei to release energy - causing outward force of energy to be larger than the inward force of gravity
        
        White dwarf: as helium fuel runs out, outward forces reduce in size and star collapses inwards - white dwarf is formed which is the core of the star
        
        Black dwarf: when star completely cools, it becomes a black dwarf which doesn't emit any light or heat