sun, in astronomy

CE5

Structure of the sun

sun, intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the solar system in their orbits.

Sections in this article:

• Introduction
• Importance to Terrestrial Life
• The Study of the Sun
• Production of Solar Energy
• General Characteristics of the Sun
• Bibliography

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