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Asked by Gajanan to Chris on 11 Mar 2016.
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Chris Conselice answered on 11 Mar 2016:
Stars form from collapsing from gas.
Imagine a big gas cloud. Overtime gravity will collapse it to a very dense gas cloud. When this happens the gas will become so dense that the atoms in it will smash together like in a nuclear explosion. This produces light – like we see in the Sun. All the light from stars comes from these nuclear explosions happening due to the smashing together of atoms in very dense gas.
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Comments
Gajanan commented on :
How many stars out there and what are they called ?
HarSimpson commented on :
Very interesting. Nice question.