Astronomy with an online telescope: Week 6: Figure 6 A section of the Sun. Energy from nuclear reactions in the core flows out to the surface, supporting the Sun against the inward force of gravity. Other stars on the main sequence are supported in the same way, making them stable..

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Astronomy with an online telescope

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Figure 6 A section of the Sun. Energy from nuclear reactions in the core flows out to the surface, supporting the Sun against the inward force of gravity. Other stars on the main sequence are supported in the same way, making them stable..

3.2 How the mass of a star affects its luminosity

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