why do stars give out heat and light?

Because when stars become supernovas they will eventually "burn out" and what remains will no longer give off light.


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Inside the stars there are many Nuclear Reactions going on and the nuclear reactions, which is fusion of Hydrogen atoms, emit tremendous heat and light.

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Inside the stars, nuclear reaction take place, i.e., atoms of hydrogen fuse with each other to form helium atom. This phenomenon gives out huge amount of light and heat.

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it is simple bcoz of a nuclear reaction in which hydrogen is converted into helium

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In the centre of stars hydrogen atoms combine to form helium atoms.During this process,huge amount of energy is released in the form of heat and light.Thius is the reason why heat and light is given out by stars.

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Because of fusion of hydrogen and helium gas

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in stars nuclear reaction (nuclear fussion and nuclear reaction) takes place in this process energy in form of heat and light was realsed this process happen many times on the stars that's why on stars there was heat and light
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Stars are huge spinning balls of hot luminous gases. In the centre of the stars, hydrogen atoms combine to form helium atoms. During this process, huge amount of energy is released in the form of heat and light.
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In the centre of the stars when hydrogen atoms combine with helium atoms they resulted to nuclear reaction. And due to this nuclear reaction stars give out heat and light.
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