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Asked by crazydaisy2006 to Jimi, Chris, Hayley on 17 Mar 2016. This question was also asked by Deeps 2005.
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Chris Conselice answered on 17 Mar 2016:
They glow due to nuclear reactions in the centres produced by the intense gravity due to their high masses which smashes atoms together to produce nuclear reactions that emit light and at the same time make elements.
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Jimi Wills answered on 17 Mar 2016:
Stars are like the sun. (the sun is a star)
Inside stars, nuclear fusion happens. This means that elements (like hydrogen, helium, etc) join together to make larger elements.
When the sub-atomic particles are rearranged to make the new element, there is a small loss of mass, which is converted to energy. E = m c squared… the energy released is equal to the mass lost, multiplied by the speed of light, multiplied by the speed of light again. You get a lot of energy for a small amount of mass!
The energy is release in the form of electromagnetic waves, which includes visible light, but also radio, xray, gamma, infrared, ultraviolet.
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Hayley Moulding answered on 17 Mar 2016:
Stars glow because inside them are lots and lots of little reactions taking place. Inside them atoms are hitting atoms. molecules are fighting molecules, and all that matter needs to go somewhere. They all get a bit heated inside there too, so heat is released. When heat is release, and energy is released, light is also. The light makes them glow, just like the Sun glows 🙂
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