ดวงอาทิตย์เป็นดาวฤกษ์ แหล่งพลังงานของดาวฤกษ์

The Sun as a star. Sources of stellar energy

Lesson 1: Solar System, Kepler's laws. The Sun is the nearest star; its energy comes from thermonuclear fusion in the core (link to section 4).

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